Green’s Dictionary of Slang

1. (also cunt-rammer) the penis.

1680		M. Stevenson Wits Paraphras’d 87: That such nice Dames shou’d for a Ball / Uncase their scutts, and shew you all, / Then send to me to scowr your Rammer?
c.1690		‘Seven Merry Wives’ in Pepys Ballads (1987) V 413: [He] has but one Stone, And besides, the worst Rammer as ever was known.
1785		‘Roger Ranger’ Covent Garden Jester 20: Cast off all the tackling about the breech [...] that uncovers the touch hole. Next get the breech down upon the bed, then you have the muzzle high enough for close work [...] lastly take your rammer in your hand, thrust home, discharge, that completes the business for the present, till you are ready to fire again.
1788		‘The Gobbio’ Chap Book Songs 7: He rammed his charge with a rammer of length / Have a care said he, there, there, said she.
1836		‘The Soldier’s Bayonet’ in Gentleman’s Private Songster in Spedding & Watt (eds) Bawdy Songbooks (2011) III 368: And when he’s in the battle, / To which glory loudly calls, / I’ll shove his rammer tighter in, / And take care of his balls!
1888–94		‘Walter’ My Secret Life (1966) VII 1313: Taking her gloved hand, I put it round it. How smooth the kid felt to my sensitive rammer. [Ibid.] 1321: Up she got, leaving me on the sofa, with my pulsating, crimson tipped, cunt-rammer out.
1897		School Life in Paris 80: This naturally ends in the lady’s maid revealing [...] the use for which the pretty little ‘rammer’ is intended.
1972		B. Rodgers Queens’ Vernacular.

2. (UK Und.) the arm.

c.1786		Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: Rammer the Arm (cant). The Busnappers kenchin seized my Rammer. i.e. the Watchman laid hold of my arm.
1788, 1796		Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn) n.p.: Rammer. The arm. The busnapper’s kenchin seized my rammer; i.e. the watchman laid hold of my arm. Cant.
1811		Lex. Balatronicum [as cit. 1788].
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1859		Matsell Vocabulum 72: ‘The cooper seized my rammer, and run me like a prad to the wit,’ the officer laid hold of my arm, and ran me like a horse to prison.
1927		‘Jargon of the Und.’ in DN V 460: Rammer, The arm.
1949		Monteleone Criminal Sl. (rev. edn).

3. the leg.

1858

A. Mayhew Paved with Gold 189: The first round was soon terminated, for Jack got a ‘cracker on his nut’ which knocked his ‘rammers’ from under him.

4. (US gay) an enthusiastic, energetic copulator.

1972

B. Rodgers Queens’ Vernacular 90: men who fuck hard and fast [...] rammer.