Green’s Dictionary of Slang

looking ill, tired.

1843		T. Haliburton Sam Slick in England I 199: There was a lawyer, a-standin’ up by the grove, lookin’ as peeked and as forlorn, as an onmated loon.
1873		J. Mair Hbk of Phrases 111: Peaked, sickly looking.
1905		‘Central Connecticut Word-List’ in DN III:i 15: peaked, adj. Thin, emaciated, as from sickness.
1911		G. Stratton-Porter Harvester 366: Why, you poor child! No wonder you are looking so thin and peaked!
1920		Ade Hand-made Fables 298: You look Peaked and All In.
1931		D. Runyon ‘Earthquake’ in Runyon on Broadway (1954) 168: You are looking somewhat peaked.
1933		J. Spenser Limey 102: You’re lookin’ peeked.
1946		A. Christie Hollow (1950) 49: You’re looking rather peaked.
1959		E. De Roo Go, Man, Go! 124: You looked pretty peaked when those cops asked you questions. I watched you like a hawk, I know.
1962		S. Longstreet Flesh Peddlers (1964) 315: You look peaked yourself.
1973		C. Gaines Stay Hungry 155: A peaked-looking individual.
1986		S. King It (1987) 635: You’re looking a bit peaked, Mr Mikey.
1999		E. George ‘I, Richard’ Evidence Exposed (1999) 113: Feel peaked a bit, Malkie.