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When your lipstick smears out after making out with a guy or girl, therefore leaving the area around your mouth, and potentially his or hers, red. Thus simulating a woman’s period.
I have such mouth period after making out with that hot dude at the bar. Fuck!

Oh my honey, you have a bad case of mouth period. My concealer won’t even help!
by Emma2907 January 01, 2019
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Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
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