Green’s Dictionary of Slang

rump v.

[SE rump, the buttocks]

1. to copulate.

[UK]M. Stevenson Wits Paraphras’d 108: But she’s no Greek, ah, can you rump it, / With such a lewd Barbarian strumpet?
[UK]View of London & Westminster (2nd part) 39: [in a list of prostitutes] Miss Stand-all [Is Visited] By Sir Richard Rump.
[UK]Smollett Humphrey Clinker (1925) I 7: I know that hussey Mary Jones loves to be rumping with the men.
[US]Trimble 5000 Adult Sex Words and Phrases 178: rump the cula (Vulg.) 1. To Copulate with a female from the position of Venus Aversa.
[UK]‘P.B. Yuill’ Hazell and the Three-card Trick (1977) 37: I’d only been rumping her as part of the job.
[US]R. Klein Jailhouse Jargon and Street Sl. [unpub. ms.].
[UK](con. 1990s) N. ‘Razor’ Smith A Few Kind Words and a Loaded Gun 472: Yeah, I’d rump Edwina Currie, but I draw the line at Maggie Thatcher.

2. to turn one’s back on as a deliberate social snub.

[UK]Grose Classical Dict. of the Vulgar Tongue ms. additions n.p.: To Rump any one; to Turn the Back to him: an Evolution sometimes used at Court.
[UK]Grose Classical Dict. of the Vulgar Tongue (2nd, 3rd edn).
[UK]G. Colman Yngr Poetical Vagaries (2nd edn) 129: He rumps us quite, and won’t salute us [F&H].
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]History of Gaming Houses & Gamesters 51: For what precise misdeed he got rumped at C—n-house [is] uncertain [...] 53: Wehn the subject to be rumped (or cut) approaches the great man, the latter eyes him over from top to toe [...] and our subject wretch raiseth his downcast eyes [...] and discovereth nought but the royal rump presented to his view.
[UK]R. Barham ‘Lay of the Old Woman Clothed in Grey’ in Ingoldsby Legends (1842) 265: His Holiness not only gets the ‘cold shoulder,’ / But Nick rumps him completely, and don’t seem to care a / Dump – that’s the word – for his triple tiara.
[UK]Sl. Dict. 273: Rump to turn the back upon any one. A still more decided ‘cut direct’ than the ‘cold shoulder.’.

3. to flog.

[Aus]Vaux Vocab. of the Flash Lang. in McLachlan (1964) 262: rump’d: flogged or scourged.
Southey Selections from the Letters IV 501: An old friend rumped him, and he winced under it.
[Aus]Satirist & Sporting Chron. (Sydney) 25 Feb. 2/2: Jemmy— I’ll bet you a rump and dozen we do. Sam— No, I never bet Rumps and Dozens. I’ve been rump’d too often myself.

4. (US) to have anal intercourse.

[US]Maledicta IV:2 (Winter) 198: Should the man remain superior, but the woman turn prone, he is said to rump her.

5. used fig. for fuck v. (2a)

[UK]J. Cameron It Was An Accident 54: Fuckin’ old bats chipped me 2p on the coffee then tried rumping me on the change.
[UK]J.J. Connolly Layer Cake 207: Jimmy’s been rumped for thirteen million quid by a loda East European grafters.
[UK]N. ‘Razor’ Smith Raiders 288: I think Budgie got well and truly rumped.