FMB 

“Fucking my dick”

This guy was FMB last night it was so good

FMB by AlexDrugrinch April 10, 2023

FMB 

fight me bitch

If you have some to say, say it to my face. Fight me bitch (FMB)!

FMB by FMB fan May 29, 2023

fmb 

Fuck My Bro

Sorry, I don't want to have sex with you. You can fmb.

fmb by Ps_x October 3, 2023

fmb 

femboy

Are you a fmb ?
Nope 🙂 ↔️

fmb by user2702 April 27, 2025

FMB 

Fleshy Meat Bag

FMB is used in software development to denote referencing the physical human that the a digital representation represents.

"After they log in, we need to do a passport check so we can link with their digital identity with their fleshy meat bag"

FMB by FleshyMeatBagDave May 9, 2025

FMB

Furry Moth Balls (in reference to the guy who cosplays as a moth furry)

Dude keep your FMBs off the spoons, i gotta use those!
Moth Furry: Sorry

FMB by Itsevelynzzz October 2, 2026

FMB's 

Shorter way to say fuck me boots.
FOS's are the opposite of this, fuck off slippers.

Look at those FMB's she's wearing.

FMB's by MadMatt74 November 17, 2003