Acronym for 'Crying My Face Off.' Often used in games after losing to another player or when speaking emotionally online about relationships or anything related to crying.
I can't believe I lost! I'm going to bed CMFO.

When she dumped me I was CMFO, but later I was like WTF!?
by mercboyan September 26, 2008
Chief Mother Fucking Officer
That lady killer just made it rain again at the club tonight -he is one CMFO
by El Jefe CMFO August 03, 2010

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