Top Definition
An abbreviation for "so much fun".

The antonym of FML.
Man: Where were you last night.

Man 2: I was at a karaoke bar. SMF.
de 13 mai 2009
stupid mother fucker
Did you just fuck that bitch with blue waffles? SMF!
de goliath92738 3 avril 2011
Abbreviation for Sick Mother Fucker
Sarah: I just drank ten Snapple teas!!!!
Leah: you smf!!!!!!!!

*Vulcan sign*
de penemaestro73 3 juillet 2013
"shaking my fist"

an acronym to let someone know that you are shaking your fist in joking anger. This can be thought of as going along with the phrase "why, I oughta...."
give me back my damn ps3, you've "borrowed" it for 5 months. smf
de j. yee 17 janvier 2011
Save My Fucking Seat.
What you say to your "friends" when you get up at a party to go get some more beer.
Asshole #1: "Go fill my keg cup."
Asshole #2: "SMFS"
de Treighz 28 novembre 2007
Acronym for "Shake My Fist"

When something is so ludicrous that a simple shake of the head will not suffice. Geared towards actions that incite slight anger and/or annoyance.
GIRL 1: "Say whaaaaaaat? Did you hear that Arnold banged his maid, fathered her child the same week he had his own with Maria, AND took her along on family vacations? Shouldn't he just go DIAF?"

GIRL2: "Agreed. ROARRRR, SMF!!!!"
de guanva 24 mai 2011

when a person is gettin on your nerves and the say something stupid ass fhuckk. you scream S.M.F
Parent: Girl u *this* close away from gettin yo ass smaked

Daughter: Butt moms u got a big ass bump on your forehead.

Parent: Bitch I kno tht! U say some dumb ass shidd S.M.F!!
de TiyyBruhh😂💯 7 janvier 2015

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