Green’s Dictionary of Slang

KFC n.

[the seller of Kentucky Fried Chicken, with its elderly mascot ‘Col. Sanders’ + play on chicken n. (4d); Ings (2010) also suggests NZ prison KF, kid fucker]

1. (N.Z. gay) an underage male prostitute.

[NZ]W. Ings ‘Trolling the Beat to Working the Soob’ in Int’l Jrnl Lexicog. 23:1 72: By the 1980s he was also known as a KFC (from the food chain Kentucky Fried Chicken). KFC is a curious construction; while the term draws into a relationship the elderly image of Colonel Sanders and the chicken metaphor, KFC also relates to boobslang’s acronym K.F. meaning Kid Fucker.

2. (N.Z. prison) a paedophile.

[NZ]D. Looser Boobslang [U. Canterbury D.Phil. thesis] 99/1: KFC n. 1 a paedophile.