1 definition by Billy Bottoms

Top Definition
1. A pompus ass. Bully. One who cannot beat those on his own "level"
2. One who sucker-punches an easily beatable opponent.
A caboosa would be like aheavyweight fighter on an ego trip who only fights welterweights.
A fat slob who sits on the little guy.
by Billy Bottoms November 19, 2006
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