Green’s Dictionary of Slang

canary n.2

[‘in true descent from the cod-piece, though not so glaring in its declaration’ (Ware)]

an ornament worn at the hip.

Show quotations
[UK] advert in ‘Ducange Anglicus’ Vulgar Tongue (1857) 45: A pair of Kerseymere Kicksies, any colour, built very slap-up, with the artful dodge, a canary, very hanky-panky, with a double fakement.