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head-butt sex, or, the act of placing one's head up another's anus, probably entering the rectum and colon.
A: What's the craziest, most fucked up shit you've ever done? B: Cranianal.
C: ew man, that's nasty
by Bentami May 09, 2006

Words related to cranianal

anal butt-sex cranberry cranium kink