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Short form or slang for 'Mental'
'This black blade right here is mence, it's not just drink that will damage your liver ' - Box12
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2
a retarded kid who teaches you life lessons by example.
normal guy (before): it seems like all my life i was defending mences...

interaction with mences.

normal guy (after): maybe, just maybe. mences was defending me.
by big tav March 09, 2007
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