It's a joke from the Naruto Abridged Series.
Quoting Sasuke: "I want to kill my brother"
Quoting Kakashi: "Why do you want to kill your brother"
Sasuke: Cuz he stole the last Klondike Bar.
Kakashi: And what would you do for a Klondike Bar?
Sasuke: I just said 'kill my brother'
(c) Masashi Kishimoto