look up any word, like cunt:
 
2.
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
 
1.
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
 
3.
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