To ruin, spoil, harm, or cause damage to.
Oh you koofed that up, didn't you?
calf preserved in formaldehyde, usually found in many a biology cupboard
1. The passing of gas
2. inappropriate person
1. chelsea just koofed , it smells badly
2. that koof failed college twice already
When a person of the opposite sex becomes an arrogant jerk in order to hide their true feelings towards you once they discover you also like like them. Most likely to happen between two really good friends and is usually a guy who is koof doggin.
Girl "Hey, so I like you more than a friend."
Boy "I like you too but I'm going to bone a bunch of girls before I actually show my true feelings for you."
Girl "You're such a koof dog!"
An extraordinary white boy hooper who only hits bottom of the net when shooting jump shots creating a ‘KOOFFF’ sound when it goes in.
Damn, he’s on fire! Pulling a Koof Dillinger!