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1.
The farting sound resulting from trapped air escaping from between the sweaty bellies of two fat people fucking. (aka- beef queef)
That couple in the adjoining motel room kept me awake for over an hour with their fat farts.
by wolfbait51 April 03, 2011
 
2.
A fart expelled by a living being which weighs more than 200 pounds.
My aunt fat farted last night, it was terrible.
by Stephan J. August 18, 2014