Countable use referring to an instance of the exclamation.
Definitions
A spoken or written instance of the exclamation “OMG”. Her text was full of OMGs and emojis.
Synonyms
oh my God
oh my goodness
oh my gosh
holy cow
holy moly
Attributive use modifying nouns (e.g., “an OMG moment”).
Definitions
Causing or characterized by shock, amazement, or excitement; sensational. It was an OMG announcement that left everyone speechless.