OMG
/əʊɛmˈdʒiː/exclamation informal
Used to express surprise, excitement, disbelief, etc. OMG! If my parents find out they will go mad!...
- I am inordinately excited (OMG!)
- omg, that girl in today's episode was a complete maniac!
- I read that entire forum thread, and omg, what a bunch of tools the regular posters are - the board admin is the worst.
Origin
Early 20th century: from the initial letters of oh my God! (the final elements may sometimes represent goodness, gosh, etc.).