A man, whose sexual preferences lean toward the male population. Who also enjoys taking part in anal sexual intercourse. Wherein his penis will inevitably make contact with excrement inside the colon. His enthusiastic thrusting creates a "punching" motion causing the excrement to become packed tightly inside the recipient. Causing great discomfort.
"Mark is such a turdpuncher!"
by TwerkedOutBrindlemeyer May 09, 2008