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1 definition by Steezy Steve

 
1.
A general term used to express approval, pleasure, or excitement.

It can be considered a modern day substitute for "the bomb", although boosie may be used in almost any context.

That's boosie!

Yuhhhh boosie!

Boosie is as boosie does.

Boosie what?

BOOSIE BOOSIE BOOSIE BOOSIE!
by Steezy Steve April 12, 2009