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A non-specific day in which there is heavy use of the word quim and increased promiscuity, often accompanied by the exclamaition 'merry quimmas'
Girl: Everybody's hitting on me today
Boy: That's because it's Quimmas!
Girl: Really?
Boy: Yes...wanna shag?
Girl: Yes
Both: MERRY QUIMMAS!
by Jezuz Cat January 06, 2009
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