muntpunch Share definition Flag the act of "fisting" shoving one's fist up another person's asshole. munt man-cunt /asshole) punch fist Dude, last night i got so drunk and let this girl muntpunch me. It hurt like fuck. muntpunch by freddyfunk September 15, 2014 0 0 Get merch Get the muntpunch mug. Buy Now — $32.95 See more merch