Derived from the sound that the troll in Harry Potter does when he misses Harry and instead hits the floor with his club.
Person 2 :A-hunga on you.
Person 1: I a-hunged Anthony yesterday.
Person 2: You did? Why?
Person 1: He crise-texted me at five in the morning because he thought he hade developed hornes in his forehead. It later turned out to be some of the missing cheese balls from last weeks party.
Person 2: He totally deserved it. A-hunga on him.