Friday Fuck-Its 

The overwhelming sense of not giving a crap about the horrendous amount of work and deadlines you have simply because it's Friday.

M1 - "Hey man, you wanna duck out early and go play some disc golf?"
M2 - "Don't you have a big report due on Monday?"
M1 - "Yeah, but I've got a case of the Friday Fuck-Its. I won't get anything done anyway."

Friday Fuck-Its by Cyrano Cytoplasm January 4, 2009

Fuck it's Friday (FIF) 

Derived from the term TGIF (thank god it's Friday) along with special thanks to the annoying new hit single by Rebecca Black, the term refers to the moment you think about 'Friday' the song, when you realize it's Friday.

Bob: Hey John! can you believe it's Friday already?

John: *It’s Friday, Friday. Gotta get down on Friday. Everybody’s lookin’ forward to the weekend*

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Fuck it's Friday (FIF)...

Fuck it's Friday (FIF) by Arctic.Spirit April 28, 2011