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Someone annoying who is always running their mouth and has something to say. Basically a person who talks crap.

Crabs are annoying because they always trying to pinch at you and a person is talking crap so they are annoying and
they continue to mess with you.
Dude 1:"Dude your such a fing scrub and your stupid!!"

Dude 2 :"Wow man your really a Crab Talker lol."
by xiDomo January 27, 2011
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