Green’s Dictionary of Slang

done up adj.2

[SE do up, to decorate, renovate a building or room]

(also done) dressed up; esp. as done up to the nines.

F.J. Grund Aristocracy in America III v 303: In this carriage [...] sat the envoy extraordinary and minister plenipotentiary, dressed in his rich court uniform [. . . .] Jupiter, the second servant, drew also near; and, gazing upon the rich uniform of the stranger, ‘Bacchus,’ said he, ‘wat are dat man so dun up for?’.
[UK]‘Old Calabar’ Won in a Canter I 147: [A] young man [...] well ‘done’ by a good London tailor [...] but dress could not rectify the very discernible want of breeding in him.
[US]C.L. Cullen Tales of the Ex-Tanks 93: The young fellows [...] pranced down the middle aisle, done up to the limit, with the swell girls.
[US]Nat. Police Gaz. (NY) 19 May 11/3: She was a beaut! All done up in one of those new-fashioned spangled gowns.
[Aus]E. Dyson Spats’ Fact’ry (1922) 24: Sweet innocence done up in pure white crepe at two-n’-eleven the piece [...] has socked him a few in her time.
[US]F.S. Fitzgerald ‘The Ice Palace’ in Bodley Head Scott Fitzgerald V (1963) 131: They passed a little girl done up in grey wool.
[Ire]Joyce Ulysses 148: Old Goodwin’s tall hat done up with some sticky stuff.
[UK]J. Curtis Gilt Kid 39: Which you spent on having your hair done up good.
[NZ]F. Sargeson ‘An Englishwoman Abroad’ in A Man And His Wife (1944) 56: They were young, quite nice looking in their own way, done up to the nines.
[UK]Galton & Simpson ‘Hancock’s Half-Hour’ ser. 5 [radio script] There she is — mmm — done up to the nines.
[Aus]F.J. Hardy Yarns of Billy Borker 26: Not like these bags here in Woolloomooloo who are either too fat or too thin, too tall or too short. And mutton done up as lamb.
[UK]F. Norman Too Many Crooks Spoil the Caper 206: Pete and Ray Williams were loitering furtively in a far corner, done up to the nines in tearaway whistles.
[UK]J. Sullivan ‘A Slow Bus to Chingford’ Only Fools and Horses) [TV script] You’ve got me done up as a bloody traffic warden!
[UK]N. Barlay Curvy Lovebox 83: There’s chicks [...] who probably got done up just to sign on.

In phrases

done up like a sore finger/thumb/toe

(Aus./N.Z./US) overdressed, flashily dressed.

[US]J.A.W. Bennett ‘Eng. as it is Spoken in N.Z.’ in AS XVIII:2 Apr. 91: ‘All done up like a sore toe’ describes someone dressed over-elaborately; many New Zealand children go barefoot much of the time, and it is with this circumstance in mind that we must interpret the simile.
[Aus]‘Nino Culotta’ Cop This Lot 197: You blokes’re done up like sore fingers. Wot’s the idea?
[NZ]McGill Reed Dict. of N.Z. Sl. 10: all done up like a sore toe Disparaging reference to someone overdressed and overimpressed with it.
done up like a wedding cake

(Aus.) well-dressed.

[Aus]Sport (Adelaide) 25 Sept. 5/3: Miss Bet is always done up like a wedding cake.