fkb effect 

A male figure whose presence has an adverse effect on another mans relationship with their girlfriend

"yo that bitches ex-boyfriend is totally fucking with Anthony's head, hes causing some serious fkb effect

fkb effect by greg johnson the third October 30, 2007

Fat Kid Badge "FKB" 

Traditionally a stain earned whilst eating.

"Bro, you got chili on your shirt."

"Yeah, it's going to leave a vicious Fat Kid Badge "FKB", good thing I carry a tide pen."

Fat Kid Badge "FKB" by Caveman4hire January 18, 2019

fkbk

FOR KIDS BY KIDS

Hello kitty liquor FKBK!!!

fkbk by Dikdickdik December 8, 2017

Fkboi 

A boy that dresses like hes "Mr steal yo girl". Slides into dms but denies they do, then makes jokes that its the girls that slide into his dms

Run at the sight of one.

also alternatively called a snake, rat, fuck-boy

"hey. I lost my number, can I have yours?"
"sorry I dont talk to fkbois aka 12vies"

Fkboi by k00 April 22, 2018

fkbae 

Fuck before anyone else

If Mary comes over I want to FKBAE

fkbae by Crazy Charlie November 4, 2021

fkbl 

fuckable

dude,that girl is hot.she's so FKBL

fkbl by kingbobas May 17, 2011

FKBS 

fucking bullshit

That's FKBS if someone says we need to praise god.

FKBS by Joel de Fisher November 29, 2023