Top Definition
Oiyo. An acronym for "Only In Your Opinion" (Used when you don't agree with someone else's opinion). Specifically used when someone comments on something or says something about someone else.
Hey the falafel here is pretty good.

by Enigma4422424224 December 25, 2013
Only In Your Opinion
dude1: Yo man that chick is so fine!
dude2: oiyo
by THeXOneXTwentyX July 04, 2010
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