1. A female who is usually significantly more attractive than the man she appears to be with that will flirt with him a lot and get him to spend a lot of money for the prospect of sex, and then abruptly fuck him over (in the figurative sense of course) by never talking to him again and/or dumping the shit out of him via the bulletproof lets be friends method.
Cock teases are typically thought to be the minions of a larger, more evil force.
Random Co-Worker: "So whats going on with you and Stacy?"
Stupid Sucker: "I spent 50 bucks on that cock tease and she won't even return my calls."