OMD
"OMD" is an acronym for "Oh My Dog". Generally used as an expression of disbelief or surprise. It originates from You Tube video "Oh my dog... - talking cat" (http://www.youtube.com/watch?v=9LBKVXyrHcw)
Variations include "OMF" Oh My Fuck, which describes a state of anger or frustration. And "OMFD" Oh My Fucken Dog, which is a mixture and hightened expression of shock, anger and disbelief.
OMD, i can't believe you just did that.
by t-pot boy February 03, 2009

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OMD
One Mega Dump.
Synonyms Shit, Dump, Number 2
An abbreviation for ones never ending trips to the bathroom.
More polite than saying "I gotta take one mega dump!"
I had OMD this morning.
Gotta go - OMD waiting.
by B.Jew June 11, 2008

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omd
Internet abbreviation for "Oh my Darwin". A Darwinist/Evolutionist/Atheist alternative for the popular internet abbreviation omg ("Oh my God").
OMD! Did you see the upper ventral region of that chick’s torso earlier?
by Gareth Mc Givern September 07, 2007

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Omd
Omd is an acronym for "On My Dick." It's primarily said when a girl is completely obsessed with a guy. Her actions can display her affection such as: following, consistently calling/texting, stalking, complimenting, complying to his demands, or anything that makes it seem as if they're whipped. This word applies to guys, too (not entirely for sexual matters).

Fun fact: Omd is commonly used in the texting world today.
Example 1:

Dude, Vincent! You won't believe it! I talked to that chick for like 2 minutes and she already wants my digits! She's Omd!
by LaX LeGenD November 20, 2009

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OMD
Obsessive
Man
Disorder
Man 1: Are you gay?
Man 2: Are you suggesting I have OMD?
by froderick1234 May 21, 2007

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OMD
Stands for "Oh My Darwin"

A replacement of "Oh My God" for Atheists
OMD, that is amazing.
by Zecryx December 12, 2016

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Old Money and Daddy Issues
That chick is so Omds.
by Daddyparker16 October 17, 2016

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