If something was completely unbelieveable/inconceivable, sometiems someone will exclaim "Sif!", a word used in internet circles. This word could be used when describing the situation of when the exclamation occured.
by KinGAleX March 21, 2005

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.
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.
by indiefocker January 23, 2005

by smol_child June 12, 2018

by jenFACE April 14, 2006

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

by mjisagenius August 07, 2005

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.
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.
by sage_darkmoon April 23, 2006
