Top definition
Verb; to insert one's fist into a partner's anus with a violent punching motion. Not for beginners. May cause serious problems with your ass down the line. Also, is very gross.

See "to punchfuck" for more.
I thought I had seen it all, but then I saw some punchfisting porn, and I couldn't get the image of prolapsed rectums out of my head for days.
by El Tonico September 27, 2007
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