jb
1) Short for jail bait.
2) A person who is almost, yet barely the age of consent.
3) Pornography which usually features girls 13-17 taking pictures of themselves naked in front of mirrors.
4) Not to be confused with cp.
"I fapped to some jb on the net. Little did I know it was my little sister."
by "A" June 14, 2008

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Top Definition
JB
Jail Bait. A girl or boy who is underage.
Back off dude. She's JB.
by Lauren Gio December 28, 2005

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JB
an acronym for the phrase Jiant Bitch
Your such a Jb
by darkmegastorm May 20, 2014

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JB
A dirty whore who thinks she is entitled unconditional love, even when she fucks ur friends and will stalk you for ur attention by getting you fired and fucking ur friends, and by trying to get her whore friends to fuck you as well.
Hey u still talking to that girl
Me: oh u mean JB, naw she got buthurt because I don't wanna date a girl who be fucking everyone.
Friend: well she must be lonely and miserable
Me: naw she doing great, she's been happily in a relationship for the last 6 years with 25 different guys and is usually single for about negative two days in-between her victims
by Noteatsmggeets December 05, 2016

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A jb is a strange fellow. at times he acts like he doesn't care, but deep down you know he does. Gets offened easily but thats just all part of the act. likes to play fight wheater he will admit it or not. thinks highly of other people but never of himself. very smart and inteligent. trustworthy. loyal, would never cheat on you. makes you stay up late thinking about him. its hard to mad at him. makes you laugh when you didn't even want to smile. gives very sincere compliments. loves curly hair. most amazing person ever.
j.b. is what you always wanted
by allyoueverwanted February 06, 2010

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To take something from a friend in an unintentional or absentminded way, most often regarding inexpensive or commonplace items.
Hey man, did you J.B. my lighter?
by quotedeen January 17, 2009

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JB
The act of finishing anything prematurely
I was with that smokin hotty last night and i pulled a Jb!
by Jon Bennet August 04, 2011

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