TSIF 

A combination of letters that when sounded out, implies a person is annoyed or frustrated

OR
The comments of letters and we found it out is another way of saying, "wow"

"TSIF that bitch is dead wrong for wearin that outfit"
*TSIF, Bitch, will you just STFU"
TSIF, What an asshole! "

TSIF by Miss ElisaMaria June 9, 2021

TSIF 

Taking shits in fenway

When girls party a little too hard past 2am at Lolitta’s. TSIF

TSIF by Kate whale July 10, 2021

TSIF 

That Snatch Is Fire. Used in front of female company when two or more bros are talking about if a female was a good lay or not.

Ja’Marcus: “aye, who’s that baddie over there?! She could get it!”
Lacedarius: “Shiiiiiit, that’s Courtney, kind of a thot but she got that TSIF!”

TSIF by KoofDillinger July 25, 2021

TSIF 

"Thank Satan it's Friday."
A variation of "Thank God it's Friday." But for athiests.

In "Friday night" by Taylor swift, pretend one of the people screaming "TGIF" said "TSIF" instead.

Background extra #1: dude, how did you mess up the lyrics in that part?! We were all literally screaming it!

Background extra #2: Sorry dude, I just didn't wanna thank some pretentious thing that wants us to worship it, so I adjusted it to "TSIF" instead.

TSIF by Secretive Plotter July 27, 2021

TSIF 

"Thank Satan Is Friday"

People say "Thank God is Friday"

But some nonbelievers Change the God to Satan

This is mostly used by people who don't like God so they say Satan

Trapo: "Don't party too hard you have work Tomorrow"

Ifeanyi: "I won't be going to work tomorrow thank TSIF"

TSIF opposite of TGIF

TSIF by Trapohoncho July 30, 2021

TSIF 

Thank Satan it’s Friday

TSIF

Irk

TSIF by Dj_Nicholas August 16, 2021

TSIFU 

This Shit is Fucked Up

A modern office space style take on the military versions of SNAFU, FUBAR and TARFUN. Created by some dudes in a small cubicle complaining about how bad management had screwed something up (yet again).

Rob: I hear they are doubling the quota and reducing the commission rate starting in January.

Brett: TSIFU, I better quit now before I owe them money

TSIFU by SoCal or bust March 20, 2008