| OMG | Oak Mosaic Golding 
| Others |
| OMG | Obama Must Go
| Others |
| OMG | Obama Must Go!
| Others |
| OMG | Object Management Group
| Others |
| OMG | Object Model Guide
| Others |
| OMG | Observed Minus Gridded
| Others |
| OMG | Ocean Magic Greatness
| Others |
| OMG | Ocean Melting Greenland
| Others |
| OMG | Ocean Modeling Group
| Others |
| OMG | Oceans Melting Greenland
| Others |
| OMG | Octopus Makes Goop
| Others |
| OMG | Ocular Myasthenia Gravis
| Others |
| OMG | Officially Miss Guided
| Others |
| OMG | Officine Meccaniche Gonzaga
| Others |
| OMG | Oh Man Guts
| Others |
| OMG | Oh Middle Grade
| Others |
| OMG | Oh My Gandhi
| Others |
| OMG | Oh My Girl
| Others |
| OMG | Oh My Goat
| Others |
| OMG | Oh My Goat!
| Others |
| OMG | Oh My Gobstopper
| Others |
| OMG | Oh My God
| Others |
| OMG | Oh My Goddess
| Others |
| OMG | Oh My Goodness
| Others |
| OMG | Oh My Gosh
| Others |
| OMG | Oh my Gould
| Others |
| OMG | Oh My Gourd
| Others |
| OMG | Oh My Gracious
| Others |
| OMG | Oh My Greatness
| Others |
| OMG | Oh My Greek
| Others |
| OMG | Oh My Grohl
| Others |
| OMG | Oh my, gerbils
| Others |
| OMG | Oh, Mein Gott!
| Others |
| OMG | Oh, My Gabe
| Others |
| OMG | Oh, My Gluesticks!
| Others |
| OMG | Oh, My God
| Others |
| OMG | Ohio Medical Group
| Others |
| OMG | Ohlone Math Gateway
| Others |
| OMG | Old Man Gloom
| Others |
| OMG | Old Man Goose
| Others |
| OMG | Old Mean and Grouchy/Grumpy
| Others |
| OMG | Oligodendrocyte myelin glycoprotein
| Others |
| OMG | Omnicom Media Group
| Others |
| OMG | Omnipresent Meatball God
| Others |
| OMG | On My Grind
| Others |
| OMG | One Man Gang
| Others |
| OMG | One More Game
| Others |
| OMG | One More Generation
| Others |
| OMG | One More Grape
| Others |
| OMG | Online Marketing Gurus
| Others |
| OMG | Online Media Generation
| Others |
| OMG | Online Merchants Guild
| Others |
| OMG | Only My Green
| Others |
| OMG | Onsite Management Group
| Others |
| OMG | Open Magic Gate
| Others |
| OMG | Open Management Group
| Others |
| OMG | Operation Market- Garden
| Others |
| OMG | Operational Maneuver Group
| Others |
| OMG | Operational Manoeuvre Group
| Others |
| OMG | Operations Managers Group
| Others |
| OMG | Oppose Microsoft Group
| Others |
| OMG | Orange Mice Grinds
| Others |
| OMG | Order More Gravy
| Others |
| OMG | Organic Meets Good
| Others |
| OMG | Organisms Genetically Modified
| Others |
| OMG | Original Mac Games
| Others |
| OMG | Original Milwaukee Group
| Others |
| OMG | Ostriches Mooning George
| Others |
| OMG | Our Mahatma Gandhi
| Others |
| OMG | Our Mighty God
| Others |
| OMG | Outlaw Motorcycle Gang
| Others |
| OMG | Outlaw Motorcycle Gangs
| Others |
| OMG | Outrageous Millennial Girls
| Others |
| OMG | Outstanding Music Genius
| Others |
| OMG | Outta My Garden
| Others |
| OMG | Overly Managed Garden
| Others |
| OMG | Owl Moon Gang
| Others |
| OMG | Oxford Metrics
| Others |
| OMG | Oxford Metrics Group
| Others |
| OMG! | Oh My God!
| Others |