SF

Shadow Fiend, not friend. The character from Dota 2 that always stays on mid.

1- Let's play lobby 1vs1 on SF
2- Fuck off, I ain't playing on Shadow Fiend

by Ranone August 7, 2021

SFS

Someone who is a slut for Sal-mon

That girl is such a sfs

by Emmaspagheti March 8, 2022

Sfs

Send for send… usually n*des related

Someone on snap: Sfs??

Other person: ew wtf no *blocks*

by Person no one knows June 14, 2022

SF

1: Six Flags; 6 Flags.

*Caption On an Instagram Story
HMU if you're goin' to SF

by The last Boyscout November 21, 2018

SFS

Shit/fart separator - the internal workings of the anal sphincters, typically referenced when a failure occurs, resulting in a shit when a fart is anticipated (a "shart").

"Oh man, I just had an SFS failure - I need to throw these underwear out."

by BillyLongD October 11, 2025

sf bake sale

A bake sale where all of the wares contain weed.

Hey man, wanna go to that sf bake sale and pick up some dank medicine?

by ShitsRealG August 1, 2014

Sf

Sick fuck

Dude you’re a sf

by Kane55 March 2, 2021