Top Definition
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
1 more definition
Fleshy carrierbag for the balls.
been scratchin' me knackersack all nate
by ash malkin April 29, 2004

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