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.
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."
"Dude, that is a serious USI."
by Gigii June 22, 2008
Get the USImug. When you get home from a USY even (conventions, dances, trips etc...) and you are really overwelmingly sad that the event is over and you look back at you time and was like woah i did some crazy shit at USY and you miss all your friends and you start counting down the days till the next event
Rebecca: Yeah I just got home from Spring Convention
David: Oh yeah me too
Rebecca: AHHHH I WANNA GO BACK NOW!!!
David: yeah USY= life
Rebecca: Deff
David: Oh yeah me too
Rebecca: AHHHH I WANNA GO BACK NOW!!!
David: yeah USY= life
Rebecca: Deff
by Jappy Jew May 29, 2005
Get the usy withdrawalmug. 
also known as PCDS, or "post convention depression syndrome"
when you come back from a USY convention feeling all sad and missing your friends.
when you come back from a USY convention feeling all sad and missing your friends.
other usyer: i'm having lots of usy withdrawal right now.
new fro usyer: you mean "hella PCDS"?
other usyer: yeah, that.
new fro usyer: you mean "hella PCDS"?
other usyer: yeah, that.
by kerflugenbachten August 7, 2008
Get the usy withdrawalmug. the feeling of utter depression and exaustion after attending an overnight USY event that you will litteraly fall asleep on anyone.
the freshman had such a USY Hangover after R.C. that she fell asleep on a senior while her pillow pet was being passed around the room.
by beatlesfanatic97 October 24, 2011
Get the USY Hangovermug. by therock_ July 18, 2020
Get the mata usimug. The best Jewish summer program you will ever attend. Whether it's traveling cross country, Israel, east, west, or cruising to Alaska. USY on wheels will create memories and friendships that last a lifetime. Singing Ruach, Shabbat shopping, and night time bonding activities are just a few of the amazing experiences USY on wheels has to offer.
by Danielab13 August 23, 2017
Get the usy on wheelsmug.