A action used during "doggy-style" anal-sexual intercourse. When a man's penis is in a man or woman's asshole, the man shouts "Donkeypunch!" and when the man/woman turns around he punches him/her in the face causing his/her asshole to tighten making the sexual experiance a lot better for the man Donkeypunching his partner.
by Donkeypuncher5000 August 31, 2004