The female genitalia; like 'cunt' only you can say it in the presence of your parents and they are less likely to know what it means and kick your ass.
I can't believe no-one else has already defined 'munk' as meaning the female genitalia!
Also used as an insult (you're such a munk, gordon)or an expletive (oh, munking hell!, for munk's sake!)
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