1 definition by Uknown person
Someone young & very attractive (most likely a girl), that you would really love to get with but cant cause she's a minor. If you get caught you can serve some serious time in jail. A saying goes 16 will give you 20, as in beig with a 16 yr old grl will give you 20yrs in prison.
Guy: Wow, Sandra's hott, I'm about to get in that!
Freind: Nah man, she's only 16, she 100% jailbait.
Freind: Nah man, she's only 16, she 100% jailbait.
by Uknown person May 30, 2009