Unwarranted Self-Importance.

To make yourself seem important without actually doing anything to benefit society.
Typical USI sufferer-
"Hey guys!! i just posted an awesome new drawing on DA, and then i posted a vlog on YouTube about what happened to me today! i also talk about my new band! i'm putting some vids on my channel cuz i know we're gonna make it big! i also just put up some new pictures of me on my Myspace (lol i dyed my hair, i look so HAWT!!!) comments PLZ THX GUYS!!! <3"
by Peter W.N. October 30, 2009
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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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United Synagogue Youth: A conservative youth group for Jewish teens in grades 9-12. Jewish teens get to meet other Jewish teens from all over North America at conventions, go on summer programs, meet life long friends and have life changing experiences.
I went on a USY summer program and I'm still friends with everyone from my group, it's been 5 years.
USY has changed my life and made me a better person with all the repairing the world projects.
by USY-er613 January 2, 2014
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An awesome Jewish youth group that has great summer programs like USY on Wheels and Israel Pilgrimage!
Touring the country with USY on Wheels was the best!
I met my girlfriend on USY Israel Pilgrimage!
by ChapterMemKad October 11, 2013
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The totally awesome youth group spanning the continental USA and Canada.

Has great summer programs.

Home to extra-awesome region, Hagalil.
"What are you doing this summer, Eli?"

"I'm doing USY on Wheels!"

"Sweet!"
by Bookworm13 April 17, 2009
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United Synagogue Youth (USY), the Conservative Jewish youth movement, inspires youth to discover and celebrate their Jewish identities through community, activism, friendship, and learning.
USY helped me find my love for Judaism, and my closest friends are still the friends I made in USY
by USY Comm October 11, 2013
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a jewish youth organization for people in grades 9-12 that try to educate young people on all things involving Judaism. everyone greets everyone with huge hugs and are a lot nicer and accepting than jewish groups like BBYO or nifty. once you come to usy you will never leave.
In USY they like to pray 3 times a day.
by hagalil! April 1, 2008
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