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1.
Response to individuals or groups of people who should know better that babble at you in undecipherable or broken English.

Origin: From an old Bugs Bunny cartoon featuring Nature Boy, not Flavor Flav.
ESL User: Hello! blah blah blah-blah Ritz Carlton blah?
You: Unga Bunga Bunga!
by Big Shirley October 30, 2010