A group selfie; a picture one takes with themselves and many others in the photo. One takes an usie to be silly with friends and have fun taking random pictures of themselves.
Guys, let's take an usie!!
by teamimperiumsbest July 13, 2013
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In Seaboard Region: Unusually Sexual Youth
In Maryland, we're all a bunch of USY.
by Ben L October 17, 2004
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"Usie" comes from the word "Usually" and "Usual"
Pronounces "U-she"

Espicially used for when you like something

(ex, facebook,tumblr,twitter,myspace,running,forever 21,tillys, starbucks,panda express)

You can use it in any conversation at any given time.
espicially texting wise.

Its a shorten word for usally, & usual
to sound cool, and very "2010" , and chill
"You go to starbucks everyday!"

"What can I say, Im a starbucks usie"

"Dude you've been on facebook all day..."
"Im a facebook usie, i have a problem.. LEAVE ME ALONE"
by LesleyNaranho July 9, 2010
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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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