Codgers. Thackeray says, “The Cistercian lads call the poor brethren of the Charterhouse codds, ” adding, “but I know not wherefore.” (Turkish, kodjah, an old man or woman.) We say “Well, old boy,” without referring to age.
“I say, do you know any of the old codds ...? Colonel Newcome is going to be a codd.” —Nineteenth Century, October, 1893, p. 589.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894