OMB
alternative to 'OMG' (oh my god) used by MCR fans and members of the MCRmy, when in schock or awe.

Replaces the traditional 'god' of 'OMG' with 'Bob', as in Bob Bryar, drummer and much worshipped member of My Chemical Romance
MCRmy kid1: "Teenagers is the next MCR single!"
MCRmy kid2: "They've already shot the video!
MCRmy kid3: "OMB!!!"
by HollyWood[MCRmy] March 30, 2007

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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!!!
by BelieberGalForever May 30, 2010

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OMB
Oh My Boobs or OMT, "Oh My Tits".
Can also be used as OMFB.
"Josh dumped me,"
"OMB! Really?"
"Yeah, that punk bitch".
by Julia and Colin February 11, 2009

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OMB
n. one-man-band; one person who plays multiple instruments

v. to perform a song in OMB style
n. Steve is totally an OMB, he plays like a hundred instruments.

v. http://music.todaysbigthing.com/2009/01/09
Check out this guy! He's OMBing the Wind Waker theme!
by Anonuuu January 12, 2009

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OMB
The short term for "Oh my Bieber" To say something is new or big about Justin Bieber.
OMB!!!! Justin Bieber's concert is only in 4 days!!!!
by rlb123 August 25, 2010

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OMB
acronym: Oh My Beelzebub.
Antithesis of OMG (Oh My God); used in the same way as OMG, but by non-believers as an expression of shock, surprise, mock disbelief, or merely a space filler when no other words come to mind; used in text messages, online social networking sites and other places where written communication is exchanged.
OMB! You did not just say that!
by Konundrummer April 07, 2010

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OMB
Stands for Oh My Blog, a preppier way of saying omg, also suggests that whatever has just happened will be discussed later on your blog.
omb, i just hooked up with jason! i have to go blog about this!!!
by x_die_for_you_x July 20, 2009

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