Cock-a-hoop

Today I was looking for a synonym for happy to fit into an acronym (Whew, aren't those fun words in themselves!)
Anyway, the word Cock-a-hoop was a synonym. Now, I think that this is a word that should be worked into out everyday conversation simply because of how fun it is to say...
Cock-a-hoop
Cock-a-hoop
Cock-a-hoop

No, seriously. What does it mean?







Used in a sentence...
"I am cock-a-hoop that my daughter is now saying Mama!"

Go ahead...try it out!