Top Definition
The art of wielding a perfect ass that a females uses to pull in unsuspecting males. Female who are practicing this art and succesfully using their ass to generate intrest are commonly referd to as practicing "assfu".
Damm that bitch gots some assfu going on!
by DMF May 24, 2005
Ass fu is the fight between the smell of your feces and the smell of the feces of the person next to you in the bathroom. This also works for farts.
I was taking a dump at work the other day and a guy walked into the stall next to me. After a minute, I had to get up and leave because his ass fu was stronger than mine.

Bob cleared out the entire office the other day with his fart. His ass fu is strong.
by deathfordough June 10, 2013
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