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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Jul 26 Word of the Day
Noun: a friend who is usually only called upon by a friend when a more primary/prominent friend is unavailable.

Taken from the term “second string” in an athletic competition situation. In football, if the star quarterback gets injured during a play, the second string is called off the bench to replace him/her. A “Second String Friend” is essentially benched until needed, if ever.

Synonyms: Plan B, Second Choice, Secondary Friend, Benched Until Needed
I got a call from X the other night. She had an extra ticket to a concert she bought for a friend, but they couldn’t make it so she called me to ask if I wanted to go because I am her Second String Friend.
by Deus-ex-machina August 26, 2020
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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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