A fork of Rural Dictionary
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.
means Fuck Miss S***** REDACTED Bro FMS
Kid: FMS am I right Other Kid: Bro FMS, FMS, 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)