When you open and close your mouth while having a cock in your mouth. Desperate girls sometimes do it on lollipops... or cock pops. O_O
A very, very, drunk boyfriend: Hey b-b-itch, lip flip me will ya!! *stumbles*
Another word for a skateboarding trick: the Three-sixty flip (to) frontside lipslide.
Fuck it man. I'm gonna go for the tre-flip lip.
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