1 definition by Nigeinjapan

word to acknowledge profound understanding of what another person has said, inferring that they need say no more, especially useful when needing to cut someone off before offending other parties involved in dialogue. Can also simply mean yes to any form of request.
"get me a beer"
"unna, bro

"Jan's mum's a dirty tart"
(jan enters room)
"Unna bro, unna"

Comes from slang australian aboriginal language
by Nigeinjapan May 9, 2005
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