Colonel Sanders, n. — Green’s Dictionary of Slang

Colonel Sanders n.

[the name, quite poss. libellous, puns on the Colonel’s internationally franchised product, KFC]

(US gay) an older male homosexual with a preference for young boys, i.e. chicken n. (4d)

1979		Maledicta III:2 220: Chicken is popular and has spawned [...] chicken queen, chicken hawk (more predatory), Col. Sanders (an Old Auntie, the French tata) for both a person and a take-out boy brothel.
2001		D. Looser Boobslang [U. Canterbury D.Phil. thesis] 45/2: Colonel Sanders n. a paedophile.