When someone is extremely obsessed with another's breasts.
He was totally uibe for her boobie.
by Noyh Howards January 23, 2013
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It stands for User Is Blocked, basically what comes up at my school every time I try to go on facebook, or a teacher sees me playing games and presses some button on their computer.
Dude, you'll never guess what happened, those basters put a UIB on "Insert gaming website here".

-NO!!!!!!
by Cklizard July 11, 2008
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