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12.
j.b
a j.b is b.j backwards, j.b is a breech of the act of 1441 that states no joel blonde is allowed to suck their penises whilst sticking hd tv's up their back passage. many roumors have been stated in the local jupiter news that j.b orgies have been raided, unfortunately the joels in question were all brunettes so no charges were passed although there is a myth that a real blonde joel performes these j.b acts at college.
hey dude keep this one to yourself but last night i totaly j.b'd ....34" n everything.

holy shit man i cant walk, i need an ambulance
why dude whats up
oh fucking hell i got hooked up with some speed last night and had a bit of a j.b
by jackisasexygitmmm January 11, 2008
 
1.
JB
Jail Bait. A girl or boy who is underage.
Back off dude. She's JB.
by Lauren Gio December 28, 2005
 
2.
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
 
3.
JB
an acronym for the phrase Jiant Bitch
Your such a Jb
by darkmegastorm May 20, 2014
 
4.
JB
The initials of a ton of people some awesome, some... not so much. The awesome include Jack Barakat, Jess Bowen, James Bond, and many others.

The not-so-awesome include Justin Bieber, the Jonas Brothers, and many others.
Person: Eh yo JB!
Justin Bieber: What?
Person: God, not you. JB!
Jonas brothers: What?
Person: NOT YOU. JB!
Jack Barakat: Yeah?
Person: *sighs* finally
by coldashype July 10, 2011
 
5.
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
 
6.
JB
short term name for Jack Barakat also known as the orignal JB, JB is from the american rock band All Time Low. Jack claims that Justin Beiber stole his nickname..

Jack Barakat, (JB) is one of the most down to earth people, to ever walk the earth. he is very funny, says some great quotes, can play a guitar very well, he cares alot about his fans, he can also be known as promoting STI and STD awareness such as Herpes on his guitar.. :)

he is THE ORIGINAL JB.. :)
girl 1: "have you heard about JB? he was shot... :(
girl 2: NOOOOOooo not Jack!! *cries*
girl 1: no justin beiber....

girl 2: oh thank **** for that...

girl 1: -_-....
by giglet April 16, 2011
 
7.
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