fmf day 

FMF Day stands for Fuck My Friend Day.

While hanging out in the backyard, all of us friends declared it FMF Day. We went inside and fucked in a pile.

fmf day by Davey J May 6, 2007

FMF Paradox 

Fucking my family paradox, The theory you can never get too close to someone who is having sex with a member of your family because of the expected akwardness. Also can be used as fucking my sister paradox or fucking my mother paradox.

Friend 1: My Sister's boyfriend keeps trying to be my best friend.

Friend 2: So what's wrong with that?

Friend 1: FMF paradox man, it's too awkward.

FMF Paradox by Billy Mcgee February 21, 2014

kjssssajjbdsgbkjsjgmsv fdsmkmdlamglkmaflkmgalmv tkdbafm b f fmdd fmf fmfmf fmvrejqmfkfmrelrelkmfrklmfkmrkmklrmlkmr 

the act of spamming your keyboard randomly when board in school

wow she just kjssssajjbdsgbkjsjgmsv fdsmkmdlamglkmaflkmgalmv tkdbafm b f fmdd fmf fmfmf fmvrejqmfkfmrelrelkmfrklmfkmrkmklrmlkmr

kjssssajjbdsgbkjsjgmsv fdsmkmdlamglkmaflkmgalmv tkdbafm b f fmdd fmf fmfmf fmvrejqmfkfmrelrelkmfrklmfkmrkmklrmlkmr by FortnitePro2001 March 17, 2022

Five Minute Footlong aka "FMF" 

Taking a shit twelve inches in length in roughly five minutes.

I just took the biggest five minute footlong.

Did you see that "FMF" that was left in the toilet?

........Five Minute Footlong aka "FMF"........

Five Minute Footlong aka "FMF" by Mr. 5150 September 8, 2010

FMFFM 

An acronym for F_ck Miami F_ck F_ck Miami. Based off 2 Live Crew's F_ck Martinez, is used by Florida State fans to show their disdain for any of the Hurricanes sports teams, mainly football, especially during rivalry week. Can also be used year-round!

Go Noles!

FSU fan #1: Man, these Thug U fans are asses, I hope we stomp their team in their Rent-A-Stadium to shut them the hell up!!

FSU fan #2: Hell yeah dude, they're pissing me off too! I would like to see their faces when those punks lose! FMFFM!

FMFFM by 850EscambiaNole October 17, 2010

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

FMFL 

When life is so shitty that FML just won't cut it, you have Fuck My Fucking Life

George: "Man I just got kicked out, FML"
Ryan: "Oh yeah? My girlfriend is cheating on me with my brother, I just got fired, and my herpes test came back positive, FMFL!"
George: "Yeah dude, FYFL, freal."

FMFL by alinaduh March 22, 2009