Jail-bait refers to someone, who is often promiscuous, that is under the age of consent. JAIL BATE refers to when a prisoner sticks his penis through the bars of his cell to be jerked by a prisoner in the neighboring cell. It's when hairy palms are expected and going blind is someone elses problem.
I'm in prison for messing around with jail bait, but now earn two cigarettes a day by giving jail bate to my neighbor.
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.