Green’s Dictionary of Slang

(US campus/Und.) a child abuser, a sex criminal.

1988		‘Siriusly’ Speaking in Just Us (H.M. Prison, Beechworth, Vic.) Dec. 25/2: chester n. Child-molester [Rhyming slang].
1989		P. Munro Sl. U.
1990		Tupper & Wortley Aus. Prison Sl. Gloss. 🌐 Chester. Rhyming slang for child molestor.
1992		Bentley & Corbett Prison Sl. 35: Chester the Molester An inmate who is in prison for sexual deviancy, whether it is rape or child molestation.
2000		Other Side of the Wall: Prisoner’s Dict. July 🌐 Chester: Child molester.
2001		D. Looser Boobslang [U. Canterbury D.Phil. thesis] 41/2: Chester (also Chester the Molester) n. a paedophile.
2001		D. Looser Boobslang [U. Canterbury D.Phil. thesis] 107/1: Lester (also Lester the Molester or Lester the Incester) n. a paedophile.
2006		‘Babydoll’ at www.asstr.org 🌐 ‘Were you peeking?’ ‘No, sorry,’ I said. ‘My name’s not Chester the Molestor.’.
2016		T. Robinson in https://entropymag.org 16 June 🌐 [A] guy straight out of central casting for the role of Chester the Molester came darting out the door.
2019		D. Winslow Border [ebook] ‘Been going around talking about he’s in for armed robbery, but [...] turns out he’s a chester’.