From The Collaborative International Dictionary of English v.0.48 [gcide]: Chirp \Chirp\, v. i. [imp. & p. p. Chirped; p. pr. & vb. n. Chirping.] [Of imitative orgin. Cf. Chirk, Chipper, Cheep, Chirm, Chirrup.] To make a shop, sharp, cheerful, as of small birds or crickets. [1913 Webster]
From The Collaborative International Dictionary of English v.0.48 [gcide]:
Chirping \Chirp"ing\, a.
Cheering; enlivening.
[1913 Webster]
He takes his chirping pint, he cracks his jokes.
--Pope.
[1913 Webster]