sif

1. Secret Internet Fatty; 2. Any person who takes flattering photos of themselves to hide their bulging fat rolls and dosn't put up a disclamer to those who seem to be ... interested.

"So I met this girl on myspace right. We talked for weeks and figured it was time to hang out and get a cup of coffee. Oh man, I walked in and took one look at her ... yelled SIF and then promptly left. It was horrid"

by detroitgoth December 09, 2006

sif

acronym for the name secret internet fatty

wow there are a lot of sifs on myspace

by mjisagenius August 07, 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 23, 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 08, 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

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