1.Amazingly sexy girl.
2.Exceptionally good ass.
1. "Is she hott?"
"Eh, Yeah, she's an OONY"
2."check out the oony on that chick."
by posyluvsya May 21, 2005
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oonie

Canadian slang for coochie, snatch
There was speculation as to whether her oonie matched the drapes.
by Skankarella January 05, 2006
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Oonie is the worlds best word,and was invented when Julia child slapped the back of Maggie Smiths head, and Maggie Smith screamed ''Oonie'' out of impulse.
Julia: ''I like your cut, G''
Julia: *Slaps Maggie's head*
Maggie: Oonie
by Salvey99 May 20, 2021
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A word originated from the game splatoon 2. It is what male octolings say for the booyah button, besides moan-like sounds. like how female inklings say woomy and male inklings say nyges, this is another word in the inkling language we can easily translate.
(inkling) splatoon 2 player 1: great! I just splatted all our spawn campers!
(octoling) splatoon 2 player 2: Ooni!
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