A bad friend. One who totally fails in all departments of friendship. They forget birthdays. Never pay you back. Encourage you to do the stupidest shit and then cheese it
when you get busted. They sleep with your mum. Basically a shit.
Human 1. Dude i slept with your mum
Human 2. what the fuck!
Human 1. and i killed your cat on the way out. soz
Human 2. You prick, you're such a thumbs down friend