BFSH 

a person who stuffs all he can in his mouth and chews LOUDLY.
Bigger and fatter than a hamster, BIG FAT STUPID HAMSTER.

Darling chin chiew joon !! U BFSH !! WAHAHHAHA xxxooo

BFSH by bigfathamster February 2, 2010

bfsr 

big fucking sniper rifle

i was playing halo and a bfsr killed me

bfsr by nOO-Eatr April 8, 2007

BFSA

Big Fat Smelly Afghan

zomg, that BFSA killed my father and raped my mother!!

BFSA by Dansan777 July 24, 2008

bfswifeforever 

Bf from fnf fangirl. Yep, just a fucking sans fangirl who is literally a mod now

Hey, did you see the new bfswifeforever mod? Yeah, the sans fangirl

bfswifeforever by Spike the fucking alligator April 23, 2021

bfsu

Bitch fuck shit up

Person 1) man this weekend is going to be lit
Person 2) bitch let’s fuck shit up (bfsu)

bfsu by Bfsuqueen October 8, 2017

BFST 

Because Friends Stick Together

"So it was Johnny who robbed the store? Why did you run with him? You could've gotten away"
"BFST man."
"What?"
"Because friends stick together."

It's from Doctor Who (2005), Series 2, episode 4, approximately 5min, 17 sec in. Mickey's poster on the wall:
Because

Friends

Stick

Together

BFST by skyslightsnow May 16, 2020

bfsn 

a big fat sweaty nonce

person 1: yo look at that bfsn over there
person 2: i know right i bet his knob has loads of smelly smegma
person 1: yeah i can smell it from here

bfsn by suckurmum69420 August 28, 2020