Top Definition
something that is in style or cool. Often said in a puckered "french supermodel" accent.
matti: Oh zat pirate coztume iz schooo caboosh!
Kat: yez, and zat hat iz schooo cabbosh!
Jeni: uhh, i am soo caboosh?
matti: no, youu are not caboosh.
by voodoogirl420 October 08, 2005

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