One who is lazy, has no friends and does not know how to have fun. Cries to their mom anytime someone says no to them and tries to ruin the life of that person.
"Dude I had this bum fuck roommate in college, Alexis Furkioti. She tried reporting me for illegal drugs and alcohol, but failed miserably."
"We all know a bum fuck in our lives"
"Bum fucks get what bum fucks deserve"
"It smells like bum fuck in there because she's a fucking bum fuck"