Words used to define rejection, a negative response.
by SANDSTAR WARRIORS January 28, 2018
Usually said in chat rooms or online forums etc. Short form of "OH MY GOD!!!"
by Kristjan May 14, 2005
Oversized Male Genitalia (OMG): a genetic birth defect that grows the penis abnormally large or to absurdly large 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.
by Suffers in silence May 27, 2012
An acronym of the Phrase Oh my God, originated from online chat, and is commonly used in online games and web chat.
Chat: OMG she is so hot!

Gaming: Liek OMG i pwned you!
by Terry Baldock April 4, 2005
Acronym. Generally "Oh my God!" For some people that don't like taking the Lord's name in vain, "Oh my gosh!" For Googlists, "Oh my Google!"
OMG there's a lot of pages on the internet!
by mikeejimbo July 13, 2006
A very silly E Magazine from Yahoo with rubbishy stories that would only entertain preteen girls
This week in OMG! :

Katy Perry gets stung by a bee
Simon Cowell slips on a banana skin
Kate Middleton shops in New Look
by Deathflower November 13, 2012
Often similar to OMG, it is used for those of different religions that tend to have more than one god, (Oh My Gods). Of course, some also add the 's' at the end to try to make it appear more unique, such as done with Lolz.
"OMGs! That's awful!"
"OMGs! So cool!"
"OMGs! Lolz!"
by Ukiuki July 2, 2005