Fmfs 

For motherfucker's sake

Guy1: I gotta go outta home fmfs

Guy2: Damn dude you should've told me earlier

Fmfs by why she is taken! February 21, 2021

FMFSL 

an acronym standing for Fuck My Fucking Shit Life. It is to be used in situations when Fuck My Life (FML) is not deemed severe enough.

Paige: You know she has a really hairy belly?
Ethan: Eww! FMFSL! No more wanking over her.

FMFSL by Ranga O_o December 14, 2009