SIF is an acronym that stands for Simple, Informative, Factual. Many people consider the SIF philosophy as their consistent state of mind. SIF can be applied in any field, be it practical, creative, or social.
Teacher: "Are you applying SIF on your essay?"
Student: "Yes, of course. That's why I'm so successful."
Student: "Yes, of course. That's why I'm so successful."
by Pootispenser April 6, 2017
Get the SIFmug. Screwed In Fantasy. The act of being screwed in a fantasy sport by a fantasy sports player. Then, going to screwedinfantasy.com and posting to make sure that all of your friends and foes read about it.
How you can get screwed: Your fantasy catcher gets benched on Sunday and you lose by one hit, giving your nemesis the week's victory. Your top notch wide receiver doesn't grab a catch on Sunday, costing you a valuable 10-15 fantasy points. Your favorite basketball player steps on someone's foot and is out for 4-6 weeks. Your fantasy hockey player misses the game winning shot, and your chance at a fantasy championship.
The list goes on and on.
How you can get screwed: Your fantasy catcher gets benched on Sunday and you lose by one hit, giving your nemesis the week's victory. Your top notch wide receiver doesn't grab a catch on Sunday, costing you a valuable 10-15 fantasy points. Your favorite basketball player steps on someone's foot and is out for 4-6 weeks. Your fantasy hockey player misses the game winning shot, and your chance at a fantasy championship.
The list goes on and on.
I took Joe Nathan in the 10th round of the draft after two other closers went, knowing Nathan was a guaranteed 40+ saves a year. One week later he goes under Tommy John surgery and I'm out of a player and a solid draft pick. You really SIF'ed me on this one Nathan.
by Screwed In Fantasy April 12, 2010
Get the SIFmug. Person1: hey bro how was lunch?
Person2: not great the food was sif
Or
Donald Trump is sif because he’s a pedophile
Person2: not great the food was sif
Or
Donald Trump is sif because he’s a pedophile
by Christoffel17 December 9, 2020
Get the Sifmug. 
fo shizzle ma nizzle, sif i wouldn't!
by auTeX March 22, 2005
Get the sifmug. - "Whoah, did you see her knock out that 500-lb ex-convict/sexual predator?"
- "Yeah, she's a total SIF."
- "Yeah, she's a total SIF."
by ecjs March 10, 2009
Get the SIFmug. by Raw Faith November 6, 2009
Get the SIFmug.