Fuck Fest Friday

The end of the week when you finally get to grab your sexual interest and do your thing together.

More bluntly put; go out with your interest, down some drinks, listen to some music and fuck each other's brains out all night.

Chick 1: "where were you last night?"
Chick 2: "you kidding, it was Fuck Fest Friday! We were in every room!"
Chick 1: "ooh nice!"

Fat fuck friday

Buying lunch on a Friday, typically tradesmen/women.

‘Did you bring lunch?’

‘Hell no it’s Fat fuck Friday I’m getting KFC’