Green’s Dictionary of Slang

1. having the characteristics and lifestyle of a spiv n.

1944		Windmill I 45: See his Spivy coat – the width of the lapels, the padded-out shoulders, and how it curled round his backside?
1951		A. Koestler Age of Longing 7: At his deathbed [...] surrounded by relatives and friends, a spivvy son and an insipid daughter.
1959		B. Naughton ‘Spiv in Love’ in Late Night on Watling Street (1969) 123: I’d nicked a bit out of the back of the collar [...] so that it gave the front points a nice spivvy cutaway look.
1989		T. Blacker Fixx 108: Underneath that neat, spivvy exterior [...] a showman was trying to get out.
1999		Guardian Guide 28 Aug.–3 Sept. 55: But policewoman Joyce Grenfell and spivvy George Cole are on hand.
2000		Indep. Rev. 14 Mar. 3: Ken used to sport a little moustache, which gave him a slightly spivvy look.
2007		S. Maloney Sucked In 65: That’d get a big guffaw from Sid Gilpin, his spivvy sidekick.
2012		(con. 1943) G.S. Manson Coorparoo Blues [ebook] The spivvy young cockatoo at the side door of the pub was an unfamiliar addition to the Soup’s gang.

2. see spiffy adj. (1)