OMB 

Old Man Band. like daughtry/nickelback

note: the members of the band dont actually have to be old for it to be an OMB

me: ew i hate this song
liv: ikr its such an OMB
nico: whats an OMB??
freddie J: an old man band you impudent hot dog!
nico: oh..
me and liv: *RIP*

OMB by omganomb May 15, 2011

OMB 

Oh My Bieber.

Instead of saying OMG(Oh My Gosh/God) you say OMB(Oh My Bieber) in respect of Justin Bieber

OMB! I looooove your new Justin Bieber poster!!!

OMB by BelieberGalForever May 31, 2010

OMB 

The shortened version of the explanation Oh My Brendon. Similar to Oh My God (OMG) but used by the Fueled By Raman Fan base. Variations include 'Oh My Bren' and 'Oh My Bden'.

Panic Fan 1: Panic at the Disco are coming in 2 months!!
Panic Fan 2: OMB!!!!! NO WAY!!!

OMB by SgtxxPepper April 2, 2009

OMB 

(oh-em-bee) A phrase similar to OMG. Simply put it means Oh my Bieber. Usually used by a underaged teen ager who is a fan of Justin Bieber. acronym.

Bieber fan#1: OMB! Justin just made a new song.
Beber fan#2: I know, it's SO good! OMB!

OMB by George Merriam November 7, 2010

OMB 

for beliebers and bieber fans, rather than "oh my gosh!" they say "oh my bieber!"

OMB! JB just tweeted!

OMB by biebie963 August 21, 2010

Omb 

On my balls.

A: I'll unfollow your page, it's becoming a huge waste of time
B: omb.

Omb by shooshool August 6, 2016

omb 

ONE MORE BOWL

Brolav: Dude the bowls already gone.

Day: Yeah i know, dude. I'm really high, but we should omb.

omb by laxaholic77 June 5, 2009