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The act of using your chin to have sex
Bobby had chin sex with Suzie on Tuesday.
by Beckzie December 20, 2006
48 45
The act of inserting your penis into a girl's butt chin and sliding it up in down in between the crevices.
Guy 1: Yo girl has a massive butt chin
Guy 2: Yeah i know we have chin sex all the time and i cum up her nose.
by carltoncumsalot July 13, 2010
60 32