Green’s Dictionary of Slang

chirrupy adj.

cheerful.

1808		T. Campbell letter 23 Jan. in Beattie Life and Letters of Thomas Campbell II (1849) 136: I cannot close my letter without telling you to laugh at all my doledrum of yesterday. I have been quite chirrupy to-day!
1831		Edinburgh Lit. Jrnl 29 Oct. 257: ‘The Old Bachelor,’ who has just returned from a summer's sojourn in the Isle of Sky, got chirrupy and cheerful over his glass last nigh.
1847		Pamphlets — Homepathic 14 217: The Frenchwoman may bestow a surplus of affection on a lap-dog or a kitten, a tan-colored terrier, or a chirrupy companion with his inevitable cigarette.
1874		F.C. Burnand My Time 8: A chirrupy stereotyped smile, on his otherwise peculiarly inexpressive lips.
1884		Christian World 25 Dec. 995/1: A chirrupy, garrulous old age [OED].
1899		B. Tarkington Gentleman from Indiana 334: You look more chirrupy than you have for several days.