Questions about example sentences with, and the definition and usage of "Omfg"

A: It means “oh my f***ing god/gosh”. Expression used if surprised, frustrated, etc. It has many uses as an interjection.

Basicall the same as OMG if you are familiar with that one. F was just added for more emphasis/exaggeration.

A: Oh, my fucking god!

A: Check the question to view the answer

A: Oh my fucking God

A: OMFG can be used to empathize a sentence into something really extreme, it could be fitting as in any situation, but in an informal way.
OMFG, I love Starbucks. (euphoria)
OMFG, I can't believe you've done this. (disappointment/anger/sadness)
OMFG, come here as quickly as possible. (worryness)