When a man lends a sympathetic ear to a woman immediately after a break up in order to sleep with her.
To feign empathy and/or compassion for a chick, often for a period of days or even weeks, who has recently had a girl-crisis in order to fuck her.
When a man is emotionally unavailable but sexually available to a girl who is going through a hard time.
Jonh: Dave, where the fuck have you been? I haven't seen you in days.
Dave: Oh, sorry dude. Amy just broke up with her boyfreind and I'm giving her a penis to cry on.
John: Just make sure your intentions are clear enough so that shit doesn't back fire and you end up in the Freind Zone. (i.e. she understands that she will have to start putting out in order to continue to get the loving care she so desperately needs)
An extremely young girl one is sexually attracted to.
Unlike a barely legal chick who lure men to incarceration with hot, nubile, tight, young bodies (see jailbait), a girl that is considered hellbait is so young that, if one were to fuck her, one would definitely go to hell.
D: Why the fuck are you watching a children's pageant on cable?
J: I can't help it, one of them looks just like Jonbenet.
D: Turn that hellbait shit off you sick fuck!