A Koala bear walks into a bar, sits down and orders a sandwich and the bartender brings him a sandwich

The Koala eats the sandwich and gets up, spins around, pulls a pistol out of his pouch, shoots the piano player, an proceeds to walk out of the bar.

The bartender, in shock, shouts to the Koala, "hey who do you think you are, you ate my sandwich and shot my piano player, and just where do you think your going!

The Koala replies, "Hey I'm a Koala. Look it up."

The frustrated bartender pulls out a dictionary from behind the bar and looks up Koala: "n. a marsupial that eats shoots and leaves."