What is Cock-a-doodle-doo?
The noise that a rooster makes early in the morning.
The rooster went "cock-a-doodle-doo" this morning.
See rooster, chicken
as in the nursery rhyme
"Cock-a-doodle-doo,
Mummy did a poo,
Daddy's in the Dunny,
And he don't know what to do"