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2.
FMS
Acronym for Fuck Me Sideways
FMS! That burger was huge!
by Montespan July 12, 2011
 
1.
FMS
abbreviation for the phrase "fuck me sideways"

Used during a time of aggression when something doesn't go according to plan, not actually as a command.

The abbreviation is generally used so parental figures don't know wtf you're saying.
Person 1: I heard you got rejected by that fly ass bitch.

Person 2: Yeah...FMS.
by alwaysmercurial April 20, 2009
 
3.
FMS
Fuck my school
Something you say when you just hate your school
Ahh, I have so much homework to do. FMS!!
by Avvegc November 11, 2012
 
4.
FMS
Freak My Shit as in fuck this dick!
Man my bitch FMS last night my nigga and all I could do was be amazed!

I wish she would hurry up and FMS!
by effinprodigious January 03, 2012
 
5.
FMS
Fuck My Spelling
AnonymousNo27 rolls up sleeve on shit to blind those around self.
AnonymousNo27: Shirt*...FMS
by AnonymousNo27 July 06, 2013
 
6.
FMS
Foot in Mouth Syndrome:

When you add something to a conversation, which is followed by an awkward silence...

Then you know that you should have kept your mouth shut.
Guy: Your sister is hot
Chick: .......
Guy: (oh that fuckin FMS... shouldn't have said that)
by thunderchid January 14, 2009
 
7.
FMS
'Fraid of Missin' Sumthin'
A condition where one is always on the lookout for the next cool thing, rather than enjoying what one has, because he/she is "afraid of missing something."
Ralph has a serious case of FMS. He's keeps scanning the joint. He can't just chill and have a good time.
by artbabe February 05, 2008