Piccadilly, adj.² — Green’s Dictionary of Slang

Piccadilly adj.²

[rhy. sl.; ult. Piccadilly, area in central London]

1. silly.

1969		S.T. Kendall Up the Frog.
1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 39: Piccadilly Silly.
2002		M. Coles More Bible in Cockney 9: God was gonna punish the people for being so bloomin’ Piccadilly.

2. chilly.

1983		R. Aven-Bray Ridgey-Didge Oz Jack Lang 39: Piccadilly [...] chilly.
2001		D. Looser Boobslang [U. Canterbury D.Phil. thesis] 140/1: Piccadilly adj. chilly.