Pirana
During oral sex the woman bites down on the man's penis like a pirana.
Dude, that chick pulled a f-ing pirana on me last night! I'm gonna be sore for weeks!
cock pirana
also known as a racker, girl who has a oral sex fetish. forceful painfull oral sex involving use of teeth and lots of it.
Wow she is great but damn she is such a cock pirana, eats it all off.