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someone who pretends to be a homosexual for a unexplainable reason but is actually not.

Stands for "Fake-homo"
guy 1: "omg i am a homosexual, i love vagina"

guy 2: "you are a fomo!"
by MarcellJ January 24, 2011
A fucking moron
Tell that FoMo, you have to cook pork before you eat it.
by TrunkJunker June 14, 2009
A particularly camp person who acts gay but is in actual fact straight. Abbreviation of 'faux-homosexual'.
"That guy in engineering is such a fomo!"
by Jamie Benning August 28, 2007
1) A fake homosexual - someone who carries certain affectations or embodies certain personality characteristics and/or behaviors usually associated with male homosexuals.
2) A homosexual male who purposefully enhances his 'image' by adopting behaviors associated with more outrageous 'out' individuals.
Person #1 to affected individual: "You're such a Fomo"
by Roma E June 05, 2006

to call someone a queer or a gay.
"Your a fo'mo faggot"
by ill' skillz December 15, 2004
The act of full on making out....
(To make out hard core)
Yo, me and my bf totally fomo'ed last night!!
by Dani Roby December 06, 2004
A Fomo is a glove slapping mofo
hey jonny why dont you fuck off you Fomo.
by joe jackson(mojo jojo) September 25, 2008