noun: the pouch of skin which contains the testes (or baws)
i have just caught my knacker sack in my zip & it hurts like a bastard
by wullie macd July 23, 2006
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Her: Do you know a park we can have a few cans in?

Him: Awww baybeh! I'll be over there in 20 minutes!!!

Her: Well, we could do a pub... but knacker drinking is true freedom :)
by Scudzer June 9, 2010
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Irish slang, used to indicate a state of mentalness
"Would you look at that?! You are off your titty knackers! Tink of the babbies!!!"
by Paddy MacMahon January 10, 2009
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exhausted, very tired
used to describe, ones self, or someone else when they are physically or mentally exhausted

'when i got to the top of Mt. Everast I was knackered as a salmon'

'i had to stay up for 3 days straight, now im knackered as a salmon'
by Mike Longford December 24, 2007
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to have sexual intercourse with a female and penetrate her massively allowing for only balls to petrude
"You off out tonight mate?"

"fo sho man, im gonna get knackers deep in that bitch"

"knnnnackeeeers deeeeep"
by voywho January 25, 2010
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Area of a slaughterhouse where animal carcasses unfit for human consumption are rendered into useful materials such as glue.

As an English colloquial expression, it is used to describe a person or object that is spent beyond all reasonable use, as in "He is only fit for the knacker's yard".
"If Barry Bonds' knee gets any worse, the only trade the Giants will find possible is one with the knacker's yard".
by Guy Dalziel August 2, 2006
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When an Irish gypsy (or Knacker) has no shower facilities and uses excessive amounts of spray deodrant to cover up the smell, whilst creating an even worse one
I was fiercw smelly the morning after that fight and so I had a Knacker Shower John Joe
by Cill-bert March 9, 2009
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