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1.
Gwinch (n)(adj) A derogatory term extracted from the game 'Mashed'. A word to describe a crusty, puss covered, and above all smelly female genitelia.
Pizz: 'Joe, you're an idiot'
Joe: 'Shut-up gwinch'
by Joe, Duff, JD and Pizz October 03, 2006