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It is the pinnacle of a "do or die" moment when one's life and or many lives are in peril and to have the bravery and testicular fortitude to save the day above all costs.
Mighty Boosh S1 ep3 Saboo and Tony Harrison on a flying carpet:

Saboo: What are you going to do when we come to the crunch?
Tony Harrison: ohhhhhhh my word, are we back to the crunch?
by The Crunch Master July 03, 2017
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when you're SO drunk that you pass out, throw up and generally get yourself into a mess. This is called going to the crunch. The crunch is the imaginary place where all this stuff happens.
dude, clare was so wasted last night, she got a one way tiket to the crunch
by wastedcrunch May 17, 2007
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The crunch is that point when your really high and you feel as if your in another universe. There are 4 points of the crunch, the beginning of the crunch is when you feel as if your there, but you still have some sense of awareness, the crunch is just straight up amazing, but the edge of the crunch is when you start to trip out, and once you fall off of the crunch, your completely fucked.
"oh my word! the frenchman is definitely at the crunch right now"
by ze tickler August 29, 2011
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The need for a morning Dump;
The inability to shit, even when the need is
"christ that first coffee has given me the crunch"
"I am captain of the good ship crunch right now, if only those pills would wear out so I can destroy the toilet already"
by towek September 13, 2009
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A lesser known name for a nasty ass STD.
I just got The Crunch from that ratchet ass bitch. This shit blows, man. My ball sack is on FIRE.
by DuckyDoolittle August 07, 2014
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A sex move where someone shoves their head up their partners ass, then thrashes their head against the wall, crushing their partners pelvis.
"Hey girl, wanna do The Crunch?"
by Hospital Bandit April 02, 2016
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