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
Secret Internet Fatty.


The SIF is quite adept at hiding his or her fat on the Internet. Usually a LiveJournal or MySpace user, they use Photoshop, high-constrast photos, and strategic camera angles to appear thinner.
Most people on MySpace are sifs.
by indiefocker January 23, 2005
sif
acronym for the name secret internet fatty
wow there are a lot of sifs on myspace
by mjisagenius July 17, 2005
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 08, 2006
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 04, 2006
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
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 07, 2007
Secret
Internet
Fatty
guy 1 >hey did you talk to tori today?
guy 2> no i found out she and her friends are SIFS
by jenFACE March 05, 2006

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