OMFG
OMFG definition by Slang.net
This page explains what the acronym "OMFG" means. The definition, example, and related terms listed above have been written and compiled by the Slang.net team.
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OMFG is short for "oh my freaking gosh" (or a more crass version of the same). This emphatic expansion of OMG is used to express astonishment and/or excitement.
Just like OMG, OMFG is one of the oldest and most-used text and chat acronyms. People who get inordinately excited and/or angry about things are most likely to use OMFG, when they feel OMG doesn't convey the strength of their feelings.