smf

Abbreviation for Sick Mother Fucker

Sarah: I just drank ten Snapple teas!!!!
Leah: you smf!!!!!!!!

*Vulcan sign*

smf

stupid mother fucker

Did you just fuck that bitch with blue waffles? SMF!

smf

"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

smf

Smell my finger . . . an acceptable form of proof that you got some action.

My boy E rolled into the hotel room looking ragged as hell at about 7a.m. and woke us all up yelling smell my finger (smf)!

smf

Slapping my forehead

Crap. I forgot to bring my books. Smf!

smf

Acronym for stupid mother fucker, often used in conjunction with l33tsp34|<, or more commonly, simply as a friendly expression used during internet chat or to spam message boards

My roomate just walked in and puked on his bed. What a smf.

You locked yourself out of your car! SMF!!!111one111

smf

"shake my fist." an expression of anger, outrage, and/or frustration, whether it be comical or serious.

"that mfer cut me off in traffic! smf!"

or

"stay off my lawn you no good whippersnappers! smf!"

or

"i hate you. smf."