Green’s Dictionary of Slang

1. the penis.

1930		(con. 1914–18) Brophy & Partridge Songs and Sl. of the British Soldier.
1935		Thieves Slang ms list from District Police Training Centre, Ryton-on-Dunsmore, Warwicks 4: Flashing hampton: Exposing the person.
1960		J. Franklyn Dict. of Rhy. Sl.
1968		Realist Nov. 15/1: There are a lot of those slang words [...] chopper, rig and hampton wick, they all mean cock, and charva means fuck.
1977		D. Powis Signs of Crime 187: Hampton (Wick) Penis (prick) and, by extension, a fool – ‘He’s a right Hampton’; also to express dislike, ‘Doesn’t he get on my Hampton!’.
1980		Barltrop & Wolveridge Muvver Tongue 82: ‘Flasher’ is actually a word devised by the police – the original expression was ‘flashing his Hampton’.
1997		Roger’s Profanisaurus in Viz 87 Dec. n.p.: Hampton rhyming slang Penis. Hampton Wick – dick. Also to get your Hampton Court – an accident involving a zip.
2002		D. Shaw ‘Dead Beard’ at www.asstr.org 🌐 Dionne gets down in the sand like she’s got a bucket and spade but the only thing that gets played with is my hampton wick.

2. a fool.

1989		J. Morton Lowspeak 70: Hampton [...] a term of derision as in ‘He’s a right Hampton’.
2003		B. Dark Dirty Cockney Rhy. Sl. 63: I was driving down the road when this stupid Hampton cut me up on the inside.