A term used to describe a person who makes a lot of mistakes. A clumsy person. Also can refer to a feline that is so fat it cannot lick it's own ass.
Quit bumping into me you butt lick!
Damn that's a huge cat. What a poor little butt lick.
The process of licking the butthole of someone else or possibly your own, depending on your flexibility. Also refers to someone that kisses ass!
Karen: My butt itches so bad!
Steve: You need a butt lick! Allow me to assist you!