Other words for flatus: the nouns: the gas, the product itself, the sound, the types.

aerosolized stool
after dinner mint
aftershocks
air
air attack  
air biscuit
air monkey
air pigeon
air poop
almond toast
anal acoustics
anal escape of wind
anal exhale
anal emissions
anal oxide
anal retreat
anus evacuation
Arkansas barking spiders
ars musica
arse blast
ass dropping  
ass flapper  
atmosphere of Uranus
backblast
backdoor trumpet
back draft
back end blow out  
bae  
barking rats
barking spiders
barley boast (a beer fart)
bean bombers
bean fumes
beaver leaver
beer fart
belching clown
big spit-up
bilabial fricative
bingo
blampf
blanket bomb
blare-ass
blinking browneye
blow-by (a fart that smells especially awful because it blew by a turd )
blow fish
blue angel (ignited fart)
blue bomber
blue darts (ignited fart)
blurp
bologna sandwich essence
boomper letters
booty bomb
bork (the sound made by a fart when you press down in the bathtub)
bottom burp
botty burp
botty cough
bram (Welsh)
bratwurst bugle or bratwurst butt belch
brewer's fart (grains and all!)
brown air biscuit
brown-body radiation
brown haze
brown mist
brown speckled mallard (a misty fart)
brownster
brun canard
bubblers
bubbling acid
buck snort or bucksnort (a particularly loud fart)
bull snort
bum and flutter
bung blast
bunghole buzzer
bunsen burners
burners
burp that went astray
burp that comes out the wrong end
butt bark
butt bomb
butt bongos
butt breather
butt burps
butt cheek bubbles (farts emitted underwater)
butt cheek squeak
butthole blowout
butt moose
butt mutt
butt trumpets (a rumblimg, bubbling trumpet-sounding fart)
butt wind
cabbage captivator
can o' chedder
carpet creeper
case of swamp ass
Chanel No. 2
cheeser
cheese toasty
chemical warfare
chert
chili killy
chold
chou pi (Chinese for "stinking fart")
chunder
churchhouse creepers
Cincinatti cyanide
colon calamities
colon cologne
cooked cauliflower cocktail
cornhole tremor
crack rattler
crepidus (Latin)
crunchy frog
cushion creepers
cyanide substitute
davebrok (a stop-and-go kind of fart )
death poot
deer grunt
deer snort
dej (Danish)
desert varnish (a wet fart)
dirt road dust
doofu (Oromo of Ethiopia)
doozer
doozy
double flutterblast
drifters
drig (Armenian)
drive by
duck call
Dutch oven (farting in bed and pulling the covers over one's head to smell it)
eggy whiffo (a particularly sulfurous emission)
EPA red alert
essence of Emeril
essence of the anus  
evacuation siren
excreted gas
explosion between the cheeks
extreme fumagatory essence
fang pae (Chinese)
fang pi (Chinese)
fannitosis
fanny beep
fanny bubble
fanny halitosis
fart
fart combo (2 or more farts made within 5 seconds of each other)
fartrogen dioxide (1940s era term )
Fartvergnugen (based on Volkswagen's slogan: fahrvergnugen, "describing a pleasurable experience)
fat lady delight
fecal clouds
fickle fuzz
fing (Hungarian - pronounced "feeng")
fingi
fire in the hole (an ignited fart )
fizz
fizz-fuzz
fizzy fuzz
flabbergaster
flame throwers
flaming cornhole
flatulence
flatulencia (Spanish)
flatus
flooper  
fluff
flurpies
flutterblast
fly breaking the sound barrier
foo-foo
foyon (Puerto Rican Spanish slang for a loud, smelly fart.)
frump (an underwater fart)
Furz (German)
fuss (Lebonese)
the fuzz
the fuzz=fizz
gas
gasser
gastronomical reprocussion
General Colon Bowel barking commands
gooz (Persian)
gross wind
grosse humours
guano-talk
gou pi (Chinese for "dog fart")
grounds for divorce
grunghee
gurglers
ham slam
hanger ("the killer that emerges the morning after two days of drinking and permeates everything, making whatever room you were in unusable for at least half an hour"
he (Japanese - pronounced "hay" )
Hershey Park (the atmospheric area occupied by a fart)
Hershey splert (fart accompanied by a tad of diarrhea)
Hershey smoke
hissers
hole in the wall gang (multiple farts)
honksa (Choctaw - pronounced "honk-sa")
hot wind
Hun Futza (German for "dog fart")
hurricane
hydrogen bombs
ignimbrite
Japanese barking beetles (term used by servicemen stationed in Japan )
Jersey torch (ignited fart, from the movie "IQ" )
jetwash (from Top Gun - )
jockey jelly
kabooms (farts that hurt - )
kanala (Danish -)
lactose liberation
laughing ass
the leather cheerio bark
lingers
lort (Danish)
love puff (England)
low flying geese
low flying jets
machine gun sound effects
massive vapor of butt gas
message from the interior
methane
misdirected burp
Missouri mud ducks
moon beam
morning thunder
mouse
mousie squeak
mudslapper
mush
musical butt
the nether belch
nicotine stains in the Hanes
nitrogen nerve gas
nuée ardent (a hot fart that rolls down the leg burning off all the hairs in its path)
nwonk (a fart that sounds like a trumpet)
one-cheek sneaks
paad (Hindi )
pants geese
pants puffer
passed flatus
passed gas
peaches
pedo (Spanish)
peido (Portuguese)
peo (Spanish, used in Dominican Republic, Puerto Rico and other Latin American regions)
pet (French)
petard
phewie
pip  
pluts
poelse (Danish)
poodles 
poof
poofume
poo gas
pooh
pooh noise  
poop fumes
poop without the mess
poopy tunes
poot
pooty pants
popcorn fart (a dry fart)
pop tarts
power poof
preets
prison break  
proot-proots (French)
prootsie
prut (Danish)
pudd (Punjabi)
puffer
puh
puk (Russian - pronounced "pook")
pulpmiller
pum  (Portuguese)
purple clouds (as in "I can't smell nothin' but them purple clouds is sho stingin my eyes!" )
putt-putts
queef (vaginal fart)
queve (a frontal emission from a woman)
rambunctious rectum
rames (Palauan) (specifically a high-pitched, long, drawn-out fart)
rare arse (quiet, undulating gentle sound)
rattler
rectal turbulence
rectum roar
report
ringo
ringtailed roarer
rip ass
ripship
the ripshit
ripskin
ripsnorter
road pizza perfume
roevgas (Danish -)
rump ripper  
rup rap (diarrhea propelled by flatus)
the scented scream
scheet (Dutch)
seam squirrels
shit fumes
shit propellant
shit vapor
shit without the mess
silent but deadly
silent but violent (SBV)
silent depth charge
silent killer
silent spadily
sitter air
skag
skid (Danish)
skidmarks in the shorts
sliders
smelly jelly (a wet fart)
smell-o-rama
smelts
smoke rings from behind
smoofer
snak (in the bathtub)
S.O.D. (stench of death)
some asshole behind you talking shit
sound spadily
soytoy
space shuttle launch  
sphincter whistle
sphincturbulence
spitters
squeakers
squib
squiffer
stainer
stale wind
stench of death
stink
stinker  (contributed by Heather)
surprise (a fart with a lump in it - contributed by K. Fisher of Virginia)
svaerd (Danish - contributed by Casper)
taco torpedo (contributed by ifartoften)
talking pants (contributed by Zack W.)
tear arse (loud, disturbing sound - contributed by Ron C., from father's Royal Navy terms)
tear ass (contributed by CS Rondeau)
telegram (a message that poop's on its way - from Proud Farter of Australia)
terminal flatulence
terminal velocity flatulence
three tone fart (contributed by Acemantsb)
thunder below (contributed by CAP1SGT0)
thunder dumpling (contributed by Ernie C.)
thunder in the buns
tonage
toop tooters
toot-toots
trail fart (a fart that follows the farter)
triple flutter blaster
triple thunder flutter
trouser cough
trouser trumpet
trump (England )
turtle
tushie belches
tush tickler
underpants lion
veirnt
ventifact
Victoria's Secret's worst nightmare
vind (Danish)
voice of the toothless one
warp drive
wet fart
wet one
whallop
White Castle's revenge
whootzie
wind
wind beneath the cheeks
wind breakage
windy pops
wizard
yelping spider
zephyr
 

Other words for flatulating: the verbs: the process, the act.

backfire
bake breeze biscuits
bake brownies
bark
bend a valve
blow ass
blow dirt
blow dust
blow a fart
blow a gasket (a wet one)
blow kisses
blow mud
blow one's O-ring
blow smoke
blow the sparkplugs
blurt
boff (England)
boom-boom
break the seam (to pass gas with high velocity or large volume)
break wind
buang angin (Indonesian)
bust a grumpy
bust ass
butt yodeling
chemold (Palauan)
clear one's throat
cleft a boofer
colon bowlin'
cook eggs
couper le fromage (French)
crack ass
crack the ripper
crepitate
crop dusting (refers to dropping one while walking past people)
cut a gasser
cut a melon
cut chedder
cut muffins  
cut one
cut the cheese
cut the provolone
deal one
degas
demonstrate Boyle's Law
dot'dot (Chamoru)
draw mud from the bottom of the pond
drop ass
drop a cookie
drop a fart
drop a ringo
drop a rose
drop one
drop one's guts
effluviate
emit a fart
erupt one  
execute one (Australian)
fardullah
fart
fart like a popcorn machine
fessa (Egyptian Arabic)
flatulate
float an air biscuit
flutter the sheets
frump
furzen (German)
fuss (Lebonese)
get expelled from stool
grunt
guff
heiny burp  
he o koita  (Japanese for "rip a fart" - pronounced "hay o' koyita")
here comes Freddie
Jag fis (Swedish for "I farted" - pronounced "yaw fees")
kentut (Indonesian)
kill the canary
launch a wifter
lay a fart
lay a jellybean
let a toot out the shoot
let a windy
let fly a fart
let Freddie out of jail
let Fred out
let one
let one rip
let wind fly
make a bingo
make a stink
make cheese
make methane
make some underleg noise
make the sheets flutter
ot'ot (Tagalog)
pass gas
peidar  (Portuguese)
peter (French)
piffle
play the butt trumpet (contributed by dean)
pollute the atmosphere
poopski
poot
pop corn  
pop off
pritz
puf
pukat (Russian - pronounced "pookat")
queimar a bota  (Portuguese)
refine shit particles
release intestinal gases
ringo
rip ass
rip one
rip the canvas
roar from the rear
shit the bed
shoot bunnies
shoot the breeze
sink my battleship
sneeze in one's pants
spider's barking
spill one's guts (Australian )
split the seam (to pass a small but signficant amount of gas)
start a Harley
start the engine
step on a duck
step on a frog
step on a fart snake
stink out loud
stomp on the barking spider
strike mud
strip a gear
supply it
taint ripper (your taint in that little piece of skin between your ass and your whatsit?)
toot
vent
winden laten