Cluck is a do-block that has the power to make someone say "cluck". Cluck is a boy.

They call me Cluck, that's what I do. When I say Cluck then you cluck too. Cluck!

Cluck is a white do-block with a red chicken hair and orange limbs (representing a chicken) and a symbol that has a speech bubble with a chicken's head.

You will first see him in Cluck.