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1. A slang nickname for the drug methamphetamine, aka crystal meth. The name is thought to originate in Thailand, where pills are sold containing caffeine and methamphetamine. 'Yaba' is Thai for "crazy medicine".
Quentin: I wouldn't touch yabba for a million quid. It's what all the mashheads do when everything else stops working.
by Ben June 14, 2006
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Guy 1: OMG- Did you hear about what happened to Andy when he was playing Call of Duty yesterday? HE LOST SO BADLY! He ended up rage quitting!

Guy 2: Yabba
by Derthy August 04, 2011
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1. The art of leaving work unnoticed and in a hurried fashion.
2. The battle cry of Frederick Flintstone (Yabba Dabba Doo).
Matt: I'm ready to go home. Wanna yabba?
Jose: Yabba!
by Fred Funk April 08, 2005
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tit
plural yabbas meaning TITS
she has nice yabbas
by watchdog February 15, 2003
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