When taking a girl from behind, the act of throwing a flailing, wild, formless punch. Usually, it's delivered to the torso, as, the donkey punch signifies a strike to the back of the head.
When you ride a girl and you feel her enjoying, really close the orgasm, you give her a punch in the face or somewhere else. You let go your imagination.
EverytimeChuck Norris brings a girl back home from the club, he gives her a good monkey punch in the face when she's about to have an orgasm. Cause no one can have more fun than Chuck.
Similar to a donkey punch but while engaged in anal intercourse, rather than one strike to the back of the head during climax, you strike multiple times like an autistic monkey.