| Acronym | Definition |
|---|
| OMG➣Oh My God (chat) |
| OMG➣Object Management Group (non-profit organization that oversees CORBA) |
| OMG➣Oh My Gosh |
| OMG➣Oh My Goodness |
| OMG➣Omega (gaming) |
| OMG➣Over My Grave |
| OMG➣Oh My Gatos |
| OMG➣Officially Miss Guided (band) |
| OMG➣Operazione Mato Grosso (Italian labor movement) |
| OMG➣Operations Managers Group (various organizations) |
| OMG➣Obama Must Go |
| OMG➣Organization Management Group (various locations) |
| OMG➣Object Model Guide |
| OMG➣Object Management Group |
| OMG➣Old Magazines (pulp and paper industry) |
| OMG➣Omnicom Media Group |
| OMG➣Oh My Gods (for Wiccans/Pagans or other polytheistic religions) |
| OMG➣Oh My Goth |
| OMG➣Outlaw Motorcycle Gang |
| OMG➣One Man Gang |
| OMG➣Operation Market Garden (gaming) |
| OMG➣Oh Em Gee (clothing business) |
| OMG➣Oh My Goddess! (anime) |
| OMG➣Oh My Gravy |
| OMG➣One Mighty God |
| OMG➣Open Management Group (computer industry consortium) |
| OMG➣Oslo Marine Group (St. Petersburg, Russia) |
| OMG➣Order of Mapungubwe (honor; South Africa) |
| OMG➣Ocean Media Group (UK) |
| OMG➣Ocular Myasthenia Gravis (Disease) |
| OMG➣Original Mac Games (contest) |
| OMG➣Oh My Ghost |
| OMG➣Operational Maneuver Group |
| OMG➣Oh My Gender |
| OMG➣Open Messaging Gateway |
| OMG➣Online Music Group |
| OMG➣Order Management Group |
| OMG➣Osseo-Maple Grove (two city area in Minnesota) |
| OMG➣Oversized Male Genital |
| OMG➣Overly Managed Garden |
| OMG➣Ow, My Groin |