Top definition
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
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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2
"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
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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
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