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 15, 2008
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A Jb is a guy that is funny and clearly we can say it very hot as fuck, you can say he is a good guy with a good intelligence, even if he could be the best crush ever he should look in his friends cause it's sure one of them like him...
Friend : your a jerk
Jb : fuck you
Friend: " why isn't him giving me any attention "
by caroot May 29, 2020
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That guy is the one for you, he is funny and clearly very hot, he has lot of intelligence and can be trusted. Even if a Jb is your crush it will be hard to make him understand you like him more than a friend. A jb can pretend that he doesn't give a shit but in fact he does. So don't be desperate if you feel nothing is coming back. In fact all Jb are very emotive but try and protect themselves
I can't love you

I am afraid
Jb i love you
by caroot May 29, 2020
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1. Jonas Brothers

2. Jacob Black

3. Justin Bieber

All 3 of them are very annoying, yet they are loved by pretty much every tween in the world.
Tween: 0mG i ~*HeArT*~ jB!!!!1!!111! Jb IS s000 ub3r *SEXXiE* 0Mg!!!1!!!
Normal person: Which JB?
Tween: aWLL uv D3m!!!!!!!11!1!!!1
Normal person: Ew. Get a life and learn to type properly.
by [.meghan.] June 22, 2010
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Also known as Jail-Bait for Jail-Bait, is a word termed by UMAMI as a person who is usually under the age of 13. Jail-Bait = too young for 18+
JB for JB = Too young for 16+
16yrold1: Did you see that HOT girl?!?
16yrold2: Dude, she was major JB for JB... YUCK
by UMAMI August 20, 2010
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Jb has a huge ass dick that it would go through your mouth to you pussy
by Haze vaxt6n February 6, 2023
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Jack Black from Tenacious D aka the greatest band in the universe
by woohoo1 September 27, 2007
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