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A derogatory term used to describe:

(1) A spurious bro who tries to fit in with genuine bros, but fails

(2) A poser, wannabe or social climber, often marked by overconfidence

Sometimes used by Anglo-Americans to express ethnic distaste or xenophobia, especially toward Italians, Jews, Eastern Europeans and even Irish

Also slang for jabroni
Bro 1: "Look at that j bro over there, what a wop! Who let him in?"
Bro 2: "I wish I knew. What kind of bro rocks an untucked black button down? And hair gel?!"
Bro 1: "A j bro, obviously. And chinstrap sideburns, to boot!"
by The Brocrastinator December 10, 2009
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A combination of the words jiggaboo and brother and is used as derogatory word used to talk about a black person.
Look at that jbro over there sagging his pants.
by Jaigermeister August 27, 2007
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derogatory only in that we could never remember his name.

a.k.a. "Jay", then "'bro", then " J-BRO", "j- b-dub" (jbw), " j-b dub-stylee" (when a sound engineer for ska / reggae band), and "jim-bo".
original response from said character in 1995, "dude, my name is Jim! ..... Uhh..., you know?... James?!

J- bro has been the contraction for at least one male who's name begins with a j and who's name doesn't match up with his face, causing confusion with more than one drunken musician in Boston, while auditioning guitarists in 1995.
" hey j, i can't hear my kick drum" (turn the guitar down)
" j-bro, when are YOU gonna buy some beers?"
"j-b-dub! doin' sound at t.t.'s tonight?"
"Iree!!! dub stylin' j-b-dub's in the house tonight!"
".. whatch you godda do is relax jim-bo!"
by donny of the drummonds September 28, 2011
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A guy with a disproportionally large ass. More commonly known as runners butt.
That dudes ass looks way out of proportion compared to the rest of his body. Thats what I call a J-Bro. Dayumn!
by Redlantrn July 08, 2009
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Super awesome computer nerd who loves riding his bike on Thursdays and has freakishly long legs.
See that J Bro over there on his bike! Man, he sure has some long fucking legs!
by Cali Halcy March 21, 2009
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The vengeful act of crapping on a lover's chest while they sleep.

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