Definitions by Jay<3Tee

SMFAO 

Smoking
My
Fucking
Ass
Off

An acronym used by smokers via text or instant message to tell the person on the receiving end that they are smoking.

Stevie: "yo where you at?"
Joe: "At the coffee shop smfao"

Wizzle: "What you dooin on 4-20?"
John: " Chillin on the corner smfao"

SMFAO by Jay<3Tee April 14, 2010