SIF

Acronym for sister i'd fuck.

hey, what's up sif?

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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."

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SIF

SIF means "Seat In Front."
It's a term used by unicycle riders to describe a way of doing a trick with the seat in front of you rather then the seat under your butt.

Example: "If you do the hop SIF, you can get more height."

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SIF

a short term for silly ignorant fag

jamie: yo adam that ambers being a ryt SIF
adam: ye man i agree what a SIF

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Sif

that big ass wolf from dark souls that has a sword

Sif is such a tearjerking boss if you think about it.

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sifs

Secret
Internet
Fatty

guy 1 >hey did you talk to tori today?
guy 2> no i found out she and her friends are SIFS

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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"

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