Fosh

When you try to defend your current sexual interest to your friend. Basically Fuck Off She's Hot, FOSH.

Lad 1: Mate that girl who commented on your insta is fucking weird
Lad 2: Fosh

by .AJ. August 28, 2017

Fossil strip

To be a fat fossil/ weirdo.

Your a fossil strip.

by Fossil48 November 7, 2017

Foster

A short, freckled kid who thinks he’s all this and that, but he’s really not

Oh did Foster give you the stink eye? Don’t give him the time of day

by Cristy Bloom February 11, 2018

fosjfnedof

big fat nerd

you are a fosjfnedof

by mrclow May 17, 2018

Fossil Whore

Someone, particularly a female, who dates or fucks really old people.

I walked in on my dad fucking my wife. What a fossil whore.

by Rozz May 25, 2018

fossilisation

CRAP THAT STAYS PRESERVED FOR A LONG FUCKING TIME!!!

Fossilisation:

This poop is so hard!! I think it has been FOSSILISZD.

by RANDOM_SHIT May 31, 2018

Fosho

Bay area slang for "For sure," meaning yes or no problem

"Aye, thanks for slappin system"

"Fosho man"

by SlangGanger May 12, 2018