Onos - oh'noss - n. - A Greek concept of rational worry; represented by Homer's Odyssey in Athena, a Greek Goddess, and many Greek heroes in other traditional works, it is considered a positive attribute.
Romans considered "onos" a negative attribute, like Odysseus' intelligence, and it became transmuted into the less-positive "onus," or "burden."
Athena's onos was manifested in her fear of Poseidon's threat to Odysseus' homecoming.
by Misty De Meo March 20, 2004
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On ocassions relating to the sale of second hand product through an app, etc. It stands for "On No Ocasion" often to do with delivery.
ONO ask for postage.
by Nguyen the knowledgeable. January 20, 2018
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"ono" Is a shorter way of saying: Oh no.

A youtuber named Martincitopants made this term.
Brother: MOM IS COMIN' HOME
Brother 2: ono
by MrTophat2875 May 25, 2021
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"Oh No". This word is used jokingly or seriousely to express distress.
by Seppuko November 12, 2002
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spooked sad face
also meaning "oh no"
1: i broke my arm
2: ono
by ExtremeCritic September 2, 2018
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A chick who breaks up a band.
That Chick in the Gadgits was such a fucking Ono
by Brenak February 20, 2006
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