oi 

1. A scandinavian expression meaning "oh darn", "crud" "oh snap!"
2. can also mean "oh not this again. . .*eyes roll*" "OMG not you. . ." "this is annoying"

The n00blet IMed me again with a bunch of spam like what they had for lunch; so I said "oi. . . ." and blocked them.

oi by Blu Phyre February 17, 2005

oi 

Something a person says when they do not know how to respond or they do not like what you said

"I miss my boyfriend I'm so horny right now"

"oi"

oi by AmandaXCostello August 27, 2016

oi 

a genre of rock music

oi by Anonymous October 30, 2003

oi 

Australian expression of indignation when someone bumps into you (like "hey"). A way to get someone's attention.

"Oi! watch where your goin mate!"
"Oi, Sarah, d'you reckon I should get this?"

oi by 4branched.lemon.tree June 11, 2006

oi 

1. A form of greeting that can be used instead of "hey" or "how ya doin".
2. A form of music that is a mix of Irish and Punk Rock; This genre includes Flogging Molly, The 4 skins, Dropkick Murphys, The Pug Uglys and The Circle Jerks among others.

1.Oi Patrick!
2.Hey lets go see that oi band.

oi by Buck Osegueda March 17, 2005

oi 

the punk-rocker way of saying hello to someone. a shout-out.

oi to the punks!

oi by SkaQueen August 17, 2003

oi 

A derogatory term used in the British Isles to get the attention of a lower class person

Oi! You bloody wanker

oi by Johhnn September 16, 2007