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You are going doggy style and you punch them in the back of the head, knocking them out until Sunday
My friend went to jail for Sunday Punching a girl.
by hizfldskjfsdlakjf August 20, 2006
1. a boxer's hardest punch
2. any measure most effective against an opponent
Sunday punch: A boxer's strongest punch or finishing move.
by none12345 November 18, 2007
A blow of attack to enemy.
"Corsair fighter looses its load of rocket projectiles on a run against a Jap stronghold on Okinawa. In the lower background is the smoke of battle as Marine units move in to follow up with a Sunday punch." Lt. David D. Duncan, ca. June 1945. 127-GR-97-126420.
by Metro September 15, 2007