Top definition
An unidentified butt object
Jonathan " My butt feels weird"
David "I think you might have an UBO, might want to get that checked out"
by strugglepig May 09, 2017
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May 2 Word of the Day
when you've done something so cringe you can't stop replaying it in your head and it stops you from getting on with your every day life
Dan: bro why have you been staring into space for the last hour doing nothing?
Me: bro i have a chronic cringe from what happened earlier I can't concentrate
by finesseeeee March 01, 2019
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2
Unhealthy Boy Obsession Syndrome

When you just happen to know everything about a boy that there is to know. Their address, their age, hobbies, grades, personality, what their house looks like on the inside, their families names, you stalk their social networking sites to the point where they will find out eventually even if there is no legitimate evidence you were on their page.

Some results of this could be bad like them thinking you are a creepy stalker, or a freak that will never get a boyfriend.
Girl: "Man, I've got such a bad case of UBOS, he's so gorgeous!"

Boy: "Holy shit take that UBOS to some other guy you freak!"
by CanOfBread February 27, 2011
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3
Useless Bag of Skin zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Andy was a UBOS.
A loser. A worthless person.
by Frankie Alvert February 07, 2005
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