O.M.G. 

Stands for Oversized Male Genitalia Syndrome. A genetic birth defect that grows the penis to absurd proportions. Every year, thousands of men are diagnosed with OMG. Sadly, most are banished to the fringes of society, victims of their own freakish length and girth.

Woman: So...let's see what you got...
Man: (Pulls down pants)
Woman: O.M.G.!
Man: What?
Woman: O.M.G.! You have Oversized Male Genitalia Syndrome!

O.M.G. by Khunna Lingas July 7, 2020

O.M.G. 

Meaning One Man Girl.

Jenny: I have six boyfriends!
Daniel: Sorry, I'm a O.M.G.

Jenny: Say what?
Daniel: I like to stick with one man you hoe.

O.M.G. by Johnny Davison March 20, 2010

O.M.G.

Oh My Gaia

O.M.G., I just came to terms with the word internal and that the magic find in life is here on this extra-terrestrial planet.

O.M.G. by CLOUD⁹ January 11, 2026

O M G 

A internet abbrieviation that has managed to break communication boundaries and is spoken by some in public.
Simply put OMG means, Oh my god!

Person 1: "Look at her outfit, can you believe someone would wear that?"

Person 2: "O M G. , have they even heard of the word fashion."

O M G by Sean Big Red July 6, 2006

O M G 

In internet chatrooms, Oh My God.

Pronounced oh em gee when spoken aloud.

O M G, that camper pwned everyone in Unreal Tourney!

O M G by Sabaku no Gaara August 20, 2006

O.M.G 

exclammation;exhaltation; wonderment; a sure fire way to start off any sentence...

**sound out each letter ... O-M-G

1. O.M.G! I am not bossy!

2. O.M.G! I'm getting married!!

3. O.M.G, is she really going out with him?

4. O.M.G. This has got to be the most intellectual conversation I have ever had ....

O.M.G by kikalicious February 26, 2008

O.M.G.I.M.Y.

Stands for "Oh my god I'm missing you." Also a song off The Amity Affliction's 2016 album This Could Be Heartbreak.

"My heart is breaking slowly, o.m.g.i.m.y."

O.M.G.I.M.Y. by This Could Be Heartbreak August 8, 2016