An unexpected orgasm.
Sheila had an O! when she awoke to Kevin sucking her nipple.
"I just had an O! when I changed my thong!" Lisa said.
"I just had an O! when I changed my thong!" Lisa said.
by ThatGirlinRed April 6, 2007
Get the O!mug. An attempt by the Omaha, Nebraska city betterment committee to create a slogan for the city.  Unfortunately in their attempts, they didn't realize the sexual connotations that are now associated with it.
slogan-"Buy the Big 'O!'"  Originally coined to keep commerce in Omaha businesses.  Now means to go downtown and get a prostitute, or in some other way purchase a means of orgasm.
by Calvin Hobbes September 19, 2006
Get the O!mug. This is the replacement for the word LOL which is a very overused word on the internet O! is a more useful word cause that is what you are rely doing when you say LOL
O! that was a funny joke
by MIKEY June 29, 2006
Get the O!mug. by myfirstdeadpanda August 10, 2008
Get the o(-. -)omug. by DaveyJones December 30, 2008
Get the :o :o :omug. by dfskdshjdsahdsa April 28, 2006
Get the o////omug. by googlyeyes77 May 31, 2018
Get the o(╥﹏╥)omug.