Green’s Dictionary of Slang

dimber adj.

1. (UK Und.) pretty.

[UK]Dekker ‘Canting Song’ in Eng. Villainies (8th edn) O2: Bing a waste to Rome-vile then / Oh my dimber wapping Dell.
[UK]Dekker ‘Canters Dict.’ Eng. Villainies (9th edn).
[UK]Head Eng. Rogue I 48: Dimber, Pretty.
[UK] ‘The Rogues . . . praise of his Stroling Mort’ Head Canting Academy (1674) 20: [as cit. 1637].
[UK]B.E. Dict. Canting Crew.
[UK]‘Vain Dreamer’ in Farmer Musa Pedestris (1896) 46: It was a dimber, drowsy mort, / She slept, I durst not wake her.
[UK]Bailey Universal Etym. Eng. Dict.
[UK]Scoundrel’s Dict. 18: Pretty – Dimber.
[UK]Grose Classical Dict. of the Vulgar Tongue n.p.: Dimber, pretty; (cant) a dimber cove; a pretty fellow; a dimber mort; a pretty wench.
[UK]Lex. Balatronicum.
[UK]‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc. 121: Dimber mot – a pretty lass.
[UK] ‘A Chaunt by Slapped-up Kate and Dubber Daff’ in Swell!!! or, Slap-Up Chaunter 46: But of all the rum mots, that I’ve chaff’d with, or kiss’d, / Dimber Polly’s the biddy for me.
[UK]Egan ‘Miss Dolly Trull’ in Farmer Musa Pedestris (1896) 143: Of all the mots in this here jug, / There’s none like saucy Dolly; / And but to view her dimber mug / Is e’er excuse for folly.
[UK]Duncombe New and Improved Flash Dict.
[UK]Hotten Sl. Dict.
[UK]B.M. Carew Life and Adventures.
[US]Trumble Sl. Dict. (1890).
[UK]Newcastle Courant 9 Sept. 6/5: Through the partially opened door [...] he saw a ‘dimber’ looking damsel.
[Ire]Joyce Ulysses 47: Buss her, wap in rogue’s rum lingo, for, O, my dimber wapping dell.
[US]A.J. Pollock Und. Speaks 29/1: Damber, dimber, dainty, a combination of an attractive girl, a clever thief and an efficient leader.

2. smart, active, adroit.

[UK]Disraeli Venetia bk 1 Ch. xiv n.p.: ’Tis a dimber cove, whispered one of the younger men to a companion [F&H].
[US]Monteleone Criminal Sl. (rev. edn).

In compounds

dimber mort (n.) [mort n. (1)]

a pretty young woman.

[UK]B.E. Dict. Canting Crew.
[UK]A. Smith Lives of Most Notorious Highway-men, etc. (1926) II.
[UK]New Canting Dict.
[UK]Bailey Universal Etym. Eng. Dict.
[UK]B.M. Carew Life and Adventures.
[UK]Grose Classical Dict. of the Vulgar Tongue.
[UK]H.T. Potter New Dict. Cant (1795).
[UK]G. Andrewes Dict. Sl. and Cant.
[UK]Lex. Balatronicum.
[UK]Egan Grose’s Classical Dict. of the Vulgar Tongue.
[UK]G. Kent Modern Flash Dict.
[UK]Flash Dict. in Sinks of London Laid Open.
[UK]Duncombe New and Improved Flash Dict.
[US]Matsell Vocabulum.