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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
Related Words

SMPfilms 

An Extremely famous Youtuber that has over 2 milliion subscribers. He is in the youtube partners list, and has 2 channels. He is also known to write back to his Youtubers alot, pleasing his fans.

He has a channel called SMPfilms, which is used for humorous videos, Blogs, and old videos about his cat. He also has plenty of Music Videos here.

He has a channel called TheMeanKitty, which is used for videos about his two cats. Sparta and Loki.

He used to have a channel called Inipropriatefilms, but it got taken down by youtube for harsh adult humor.

His most popular video, 'The Mean Kitty Song' on SMPfilms, nearly reached 30 million hits, this was a stunning achivement for SMPfilms.

A rumor that SMPfilms is being sponsered by Google has been coniformed, by SMPfilms himself. SMPfilms is getting plenty of suscribers by the day.
Music Videos SMPfilms
SMPfilms by Monkeymja - Youtube January 16, 2010
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: 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.

smpfilter 

smpfilter is an editor on Instagram
“YOO check it out! smpfilter posted on Instagram!”

what the hell are you talking about. they don’t post on that Instagram account anymore”

“oh right”
smpfilter by anonymous February 21, 2023
Shit my pants funny. The former may result if you feel as if you are about to experience a bowel movement as a result of laughing too hard. Actual shitting yourself is not recommended; get to a bathroom ASAP! pmpf
Dude 1: hey this chick i know was havin a marshmallow roast in her backyard right... she had her mellows on stix n was set to go wen some firetrucks came w/ their sirens blastin n shit.. so her n her frenz went see what was up. friggin the house across the street was all up in flames n shit. the couple who owned it was standin outside the house all upset n then there was the chick with her mellows on a stick set n ready to go. lady gave her the dirtiest look EVER!
Dude 2: holy shit! fuckin smpf! aww dude brb...
smpf by Kewkew ka chew October 25, 2006