An acronym standing for Ugly Pilgrim Boy. Refers to pretty much anything you think is weird, creepy, funny, etc. Can be used as an adjective or a noun.
1. He is upb

2. Ew, that's so upb of tinachan and dreachu to trace other people's drawings and then go bashing other tracers

by Dokochu and Linachan October 04, 2009
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Standing for "Unidentified Party Bruise".
the common (but not remembered) cause for this is :
a) running into things
b) falling on your face
c) general clumsiness

These contusions are noticed most likely the morning after, with a slightly hungover expression of "huh?"
"Sh**, I totally don't remember getting this U.P.B"

"I thought you punched me in the face, but now I find out I just fell over"

"There is a huge U.P.B. on my leg"

by kittums October 25, 2008
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"I broke up with him last night. I can't believe what a perv he is. We were all, like, making out and everything was great and all of a sudden I was like "ouch" what the hell are you doing? Yeah, can you believe he wanted to have UPBS!"
by Ms.Bg June 27, 2008
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Upper Pussy Bulge, also known a s FUPA (fat upper pussy area). That extra pouch of fat in obese chicks that hangs over their genitalia
by Ned Reierson August 28, 2011
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Short for "Yo(U) (P)oor (B)astard. Anyone who has to do anything deemed undesirable.
"I have to work all weekend."

"Sorry to hear that, UPB."


"You poor bastard."
by terajoule November 28, 2009
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Acronym for unidentified party bruise.
I went on a bender last night, and woke up with seven UPB's; it must have been a great night.
by Michael Blagg April 20, 2006
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