Definitions by Notasexnark

sex nark 

A girl that hooks up with you after you hooked up with her friend and tells the friend is a sex nark. Said another way, it's a backstabbing slut.

Guy A: That girl from last weekend totally told Rebecca I hooked up with her.
Guy B: What a sex nark.

sex nark by Notasexnark January 23, 2020