1. Unprotected sex with another person

2. When someone does something sick or gross and you "match" the act with one equally as sick or gross
1.Dude, I took this girl home and we totally matched nasties
2.Hey, how about I fart. Then we all match nasties
by 1bigfloppydong August 31, 2010
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to have similar sexual desires as another
She won't let me go down on her, she don't match my nasty .
by anonymous_tales February 13, 2017
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