Top Definition
When one messes up in a big way. FUBT, meaning Fucking Up Big Time. Pronounced Eff You Bee Tee.
"Apostolos, you fucked up again! FUBT!"
"Everytime Apostolos fucks up, everyone laughs! He's FUBT!
"Everytime Apostolos fucks up, everyone laughs! He's FUBT!
by esterminator
July 23, 2013
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