s2f 

Shorthand for "swear to fuck". Similar to s2g.

If she doesn't bring back what I asked for from the grocery store I s2f I'll riot.

s2f by Alex the Alien January 23, 2018

s2f wank

"Start to finish" wank - when you wank quickly without stopping - from flaccid right up to ejaculation

Just had an s2f wank - didn't even pause for breath

s2f wank by Jared Pollock November 29, 2011

s2fg 

swear 2 fucking god

used in a homestuck update, page 7537

TG: its the jake probbies isnt it

TG: its always the jake probbies i s2fg

s2fg by PixieBubblez December 23, 2012

S2FF 

Stay To Finger Fucking.

Don't get pregnant.

ESTER: Listen scumbag! Stop smoke the big dripping hand roll fake cigarettes, don't do drugs ya' know.

DUDE: Ehh what?

ESTER: Your mother should S2FF!

ESTER: Btw. I Do, i got a fat finger baby.

S2FF by †reptilicus† June 17, 2010

s2fiona

always right about everything

me: @s2fiona is right about everything
everyone: i know

s2fiona by iansgoldthong2 July 18, 2021