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4. FMO
FMO means freak me out and is usually used with OMG...it works best!!
omg, fmo he didnt!!
FMO u didnt!!
FMO
OMG FMO thts mingin!!!!!!!!!!!!
by Abna Jul 16, 2005 add a video
1. fmo
fuck me over.
girl 1: i hooked up with your boyfriend.

girl 2: fmo you bitch.
2. FMO
Fuck Me Over.

To be stunned/shocked/pissed off when something really bad (and very often ill-timed) happens.
Computer: "Microsoft Word just decided to delete you 20-page document and it's content."
Me: "FMO!"
3. FMO
FMO means Fucking me off!
OMG, bitch you are fmo right now?

Bitch, don't you dare! oh no you are fmo bitch!
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