bfbm 

Big feet big meat; meat meaning dick

i saw jackson’s feet and i instantly thought BFBM and i texted my bitches about it.

bfbm by fatassbitchh February 23, 2019

BFBM 

Simply put, Big Fat Booty Meat

For a little fella I definitely got some BFBM

BFBM by Macewindudu January 23, 2023

BFBM 

Big Fuckin' Bowel Movement

Ed asks, "Hey stu, why were you so late to class this mornin'?"
Stu answers, "BFBM."
Ed promptly replies with a nod, "Ah right. Say no more."

BFBM by Edmaster7263 January 5, 2010