Top Definition
Someone that gets girls, but doesn't know what to do with them because they are to sensitive for their own good.
He is like an Onu, a player on the outside but a sweetheart on the inside.
by Ivanne January 06, 2009
a word to describe a condition of extreme dangleberries (up to 3cm) formed as a result of frequent and extensive pounding in and around the anal region
After spending the night with B, i have contracted a severe case of Onus
by besteverrrrrrrrlife July 27, 2010

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