Top Definition
when your roommate is trying to perform a fucktality on you, while a girl is riding you on the bottom bunk and you being the quicker minded being, thrust so hard that the girls head shoots through the top bunk into your roommates back, killing him instantly, thereby saving yourself from instant death and you continue to enjoy the pleasure of fucking the girl while she dangles from your dead roommate's back
my roommate tried to do a fucktality on me last night, but i completely did an anti-fucktality on his ass. and the sex was good
by patLanddaveRM October 19, 2008

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