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1.
An exclamation following a positive result.
he goes past one, he goes past two, he shoots, he SCORES!!! BOOMSHAKA!
by PigMaster October 27, 2003
 
2.
to be shown something. can be use instead of in your faceand moded.

i told you the lakers suck, boom shaka.
by Erwinicus March 21, 2007