A place for kids whose parents think that they are getting a Jewish education to hook up with random Jews. In the process, kids do learn about Judaism, and everyone wins.
Christian: Want to hang out this weekend?
Jew: Nah, I'm going to usy!
Christian: Man, that place is a total Jewfest.
Jew: Yeah, but I get to hook up with random horny girls!
Christian: True. Sorry for trying to cockblock.
by Stevenbobeev'n April 6, 2008
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a great place to find HOT guys that we're all related to!
"Morgan would have sex in heels"
"Cayla falling asleep on who?"
"Skeez"
"Choclate"
"Marshmellow"
"Pink marshmellow"
"Graham Cracker"
"Eli's trisexual"
"Pink tie and red shirt"
"SHAKE YOUR BOOTY!"
by The Smores April 19, 2005
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NERUSY,
Naked Entertainment Representing Unbearably Sexy Youth
J & b are in USY, they are from NERUSY and wheph are they smokin'
by NERUSY-ite December 8, 2006
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A terrible rip off of BBYO. Even worse than NFTY which is still worse than BBYO.
Boy 1 : Dude lets go to the USY dance.
Boy 2: No way man I'm going to the BBYO dance. Its so much better!
Boy 1: You're totally right! The girls in BBYO are way hotter!
by Sarah Schwartz April 13, 2008
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A youth group who tries to keep up with the amazingness of BBYO. The only problem is that the girls are no where near as hot as BBYO's BBGs.
Wow, that BBG was way hotter than that USY girl
by The Great Aleph February 28, 2005
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a Jewish youth group that is not nearly as cool as BBYO. they will try to tell you differently, but you can't believe them.
I went to a USY event, and it was so lame. I'm definately sticking to BBYO from now on.
by MazGiz July 12, 2006
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Unidentified Sex Injury
Those bruises, cuts, muscle strains, and torn ligaments that happen after a night of vigorous sex - and you cannot remember exactly what you did to cause it.
"Holy crap! My one leg is completely covered in bruises, but I don't remember what we were doing and how it got that way!"

"Dude, that is a serious USI."
by Gigii June 12, 2008
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