The process of turning a girl you've just met, or don't know well into a hook-up in the course of a night.
Nick: I met this sexy-ass bittie
the other night at Starbucks and we walked around for a little while.
Joey: Did you convert on her?
Nick: Yeah I got dome
in the back of my car!
Al: I converted on this girl I met at Melanie's party.