SMSF 

A short slang for ‘so much so funny’

Kenny: I just peed in my pants?!

Lyn: LMAO UR SMSF..
Kenny: I know.

SMSF by coochiedestroyer5 November 12, 2020

SMSFS 

Acronym newly formed in online forums. Meaning: Start Making Some Fucking Sense.

"Your posts are incoherent and it seems like you're rambling. Please, learn to type and SMSFS!"

SMSFS by costa1 September 21, 2005

SMSFTI 

SMSFTI: someone save me from this imp

SMSFTI
Davis said "SMSFTI" so Raquel wouldn't know he hated her and in turn slit his god damn throat.

SMSFTI by sssssssssssssssssssssssssssoup September 4, 2010