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When you fart and it sounds like your butthole is motorboating your ass cheeks.
Damn Hardy!did you just assboat all over yourself?quit assboating!
by hardymetal August 04, 2010
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When someone sticks their face in between your ass cheeks as you make a vigorous, vibrating "brrr" sound with their lips.
Mike saw a naked Tim lean over to pick something up and launched a sexy surprise assboating attack.

Ken ended up accidentally assboating his girlfriend when they were picking up their clothing off the floor after sex.
by MissLynx July 29, 2013
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