Gay. Mainly used on arcade hi-scores instead of "homo".
That guy's a proper omo, he keeps acting gay.
by 'jak' May 3, 2005
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Omo is an obese child who resides in Manchester. He is a XL-size uniformed pupil at Prestwich high school. He is a major scally who finds maternity pants 'casual-wear'. He usually eats about 3-4 packets of crisps during break and several meals at lunch. He speaks in grunts that can be barely understood. Avoid looking at him he can cause vomiting and other physical sickness.
"Hey omo is that your manbreast hanging over your bagstrap".... "Rass 'tis"
"Om, chom, um that's good" (Eating sounds)
"Omo go away your making me ill"
by "Omo makes me ill" October 27, 2004
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Drake: "OMO alright"
On P.Reign ft Drake- DnF
by Honeyxx November 17, 2014
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On my own

Used to reference having to do something or go somewhere by yourself.
(slacker friend): "dude, totally just got the over achiever as my partner for the history project."
(you): "yeah there wasn't anyone left in my class so looks like I am OMO again..."

Or

(you): "dude Chelsea just asked duke to the dance!"
(best friend): "that sucks! Guess your goin OMO again."
by Hurdledrive February 13, 2013
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(V) The act of unintentionally mentioning or referencing a topic previously discussed mostly having to do with pop culture and/or sports.
"Lol Ryan just sent me a video of that basketball fight."
"Didn't that happen 3 days ago?"
"Ya he totally pulled an omo"
by Hdbeve ssnjebdvddv May 21, 2017
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An emoticon depicting a Prawn from the popular 2009 movie 'District 9'.
MNU Agent 1: lol!

MNU Agent 2: wat?

MNU Agent 1: (OmO) <--- its a fookin prawn!
by youcantseemeintheseglasses April 15, 2010
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