Definition of OMG in English:

OMG

Syllabification: OMG
Pronunciation: /ˌōemˈjē
 
/

exclamation

informal
Used to express shock, excitement, disbelief, etc. OMG! If my parents find out they will go crazy!

Origin

early 20th century: from the initial letters of oh my God! (the final elements may sometimes represent goodness, gosh, etc.).

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Word of the day punctum
Pronunciation: ˈpəNGktəm
noun
a small, distinct point