dd head

Anything that starts with a 'd' and then "head."

e.g.
dumb dumb
dinosaur dinosaur
doo doo
duck duck

1: "Yo, is the plural of the word monkey '-ys' or '-ies'?"
2: "You're such a dd head, the answer is obvious."
1: "Oh yeah? Then what is it?"
2: "..."
1: "Tchyah, now who's the dd head?"
2: "SILENCE BUFFOON."