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2.
A car (usually import, more recently domestic) which has no performance modifications to it except a high flow exhaust system that when the driver steps on the gas, makes a sound like you're farting into a bucket.
"Pbbbbbbbbbbbbbbbbbbbbbbbwbwbwbwbwbwbwbwbwbwbbb", said the Honda Civic

"Look at all these high school kids driving around in their fartbuckets."
by TMGChuck January 28, 2010
 
1.
A bucket that rebelious children continuously fart in and close the lid to trap the stink inside. Then they hope their parents will open this bucket and get a waft of child fart.
Dude, I can't wait for my bitch Mom to open my fart bucket. It's got three years of my stinkiest farts waiting for her.
by Sally Crapbasket May 10, 2009
 
3.
An exhaust mod that exceeds 3 inches in diameter. Frequently used by ricers
lol look at that ricer with a huge fartbucket! i bet it gives his car 20 more horsepower!
by markalkema777 December 19, 2008
 
4.
an insult towards someone who has bad flatulence
Damn you fool, your a mother fuckin fart bucket
by HallB January 25, 2006