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A person who claims to be a black belt in karate, but who actually only studied for a couple of months or not at all.

ETYMOLOGY - This word comes from the name of a fictional character named Daniel Larusso, who was the protagonist in "The Karate Kid"; a mediocre but hugely successful American film released in the early 80's which starred Pat Morita and Ralph Macchio.
After he got his ass kicked by that green belt, I figured he had to be a Larusso.
by Tim L. May 08, 2003
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