A fart smack is when you sneak up on an unsuspecting sleeping friend or foe, squat over their slumbering face (pants optional) and unleash a large, preferably disgusting odored fart. Swiftly after you must wake them up with an authoritative smack to there face. Thus waking them up to a big, startled gasp of ass gas.
Dude, Joey is such a douche bag, lets fart smack his ass tonight!
by TEESHIRTIME January 06, 2011
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