Sif 

Describes something or someone as gross or rotten

Person1: hey bro how was lunch?
Person2: not great the food was sif

Or

Donald Trump is sif because he’s a pedophile

Sif by Christoffel17 December 9, 2020

sif 

sif = as if (what the hell)

commonly used by try hards

fo shizzle ma nizzle, sif i wouldn't!

sif by auTeX March 22, 2005

SIF 

Strong Independent Female

- "Whoah, did you see her knock out that 500-lb ex-convict/sexual predator?"

- "Yeah, she's a total SIF."

SIF by ecjs March 10, 2009

SIF 

Someone I'd Fuck

Guy 1:Hey your sisters SIF

Guy 2:Man fuck you
Guy 3:He's right she is SIF
Guy 2:Fuck all y'all

SIF by Raw Faith November 6, 2009

SIF 

Acronym for Sorry I Farted

A: "SIF!"
B: "oh no not again!"

SIF by EnglishOK November 11, 2019

SIF 

Acronym for sister i'd fuck.

hey, what's up sif?

SIF by Chyo Mamma April 9, 2009

SIF 

'Smooshed In Face'

Someone who was either born with a 'Smooshed in Face', or had an accident with the baseball resulting in a 'Smooshed in Face'.

A) "Dude, that girl is pretty cute."
B) "What? are you kidding she's a total SIF."

SIF by Strings Jr. September 12, 2009