sif

acronym for the name secret internet fatty

wow there are a lot of sifs on myspace

by mjisagenius July 18, 2005

sif

Secret Internet Fattie

they learn ways to edit pictures of themselves and use angles when taking said pictures to make themselves look thin and hot even though they aren't.

Brookyln beatdown on myspace is a SIF and still won't post pictures to prove she isn't.

by sage_darkmoon April 5, 2006

sif

acronym for: secret internet fatty.

molly: omg that girl is huge!
tina: i saw her pics on myspace, i thot she was skinny!
molly: wow what a sif!

by Sarah B. August 7, 2007

sif

Short for "as if"

Internet slang, used lots in chat of online computer games. Some people also say it in real life now.

Some noob says: "sif you just killed me with a hs, i was behind the wall"

by zOOyOrK1.5 March 18, 2009

sif

A shortened version of "as if". Commonly found in online gaming circles.

Sif you know what you're doing, noob.

by Redknob November 21, 2002

Sif

(Adjective) - source : South Africa

Disgusting, gross, repugnant

"Did you see that picture of Trump naked?"

" Ja, it was sif... "

by Stroomf February 10, 2016

sif

means 'as if' in the land of aussies (or mostly)

A - 'did you know that i wont $100000 last night?'

B - 'like sif'

by hateschem March 15, 2009