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1.
OMN
O my nigga
white nerd: hey watchu get on that math test yesterday?

Black dude: 97

whitey: OMN

Black dude: imma beat u down flourcake cuz if u aint black u cant be talking like dat
by cassiedahobo June 28, 2009
 
2.
OMN
stand for Oh My Noob...a phrase commonly used in videos games or to explain something someone has done incorrectly
OMN=Oh My Noob
What a N00B!

Matt:You suck at football
Tyler: Yea your a N00B
Json:Yea you fuckin N00B!
Pitnat:I hate N00BS
Cory G:Yea they suck cock
Brit:I wanna drive!
Samantha:No Brit remeber what happened last time?
RanD:Wanna get high?
Danny:Fosho
by oMNxTyLeR April 22, 2009
 
3.
omn
abbreviation for Oh My Noodles, another way of saying u r surprised.
person 1- I JUST ATE MYSELF

person 2-omn!
by omnperson August 02, 2010
 
4.
OMN
Oh my nuts
OMN, I left my wallet at home.
by ga231 January 11, 2010
 
5.
omn
oh my ninjaz
person 1: Did u c that movie
person2 : Omn for the last time yes
by ksd388 May 03, 2009
 
6.
OMN
Stands for Oh My Narnia! Used by Narnia fans
Fan #1: Narnia 3 is coming out in 2010!

Fan #2: Are you serious?!

Fan #1: Yeah!

Fan #2: OMN!!
by cspnthprnce August 09, 2008