Cheerful and lively

Usage examples of chirpiness.

He hated to own it, but he had to own that wherever he had met the two branches of the Anglo-Saxon race together in Europe, the elder had shown, by a superior chirpiness, to the disadvantage of the younger.

A person with Barney's hospital experience knows excessive chirpiness does not bode well for the chirpee.

Young, medium bright, full of chatter and chirpiness, expecting from minute to minute the arrival of their boyfriends.