Green’s Dictionary of Slang

1. chilly.

1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
1981		J. Franklyn Dict. Rhy. Sl. (2nd edn).
1992		R. Puxley Cockney Rabbit.

2. (also Auntie Willy) silly.

1932		‘P.P.’ Rhy. Sl.
1953		T.A.G. Hungerford Riverslake 188: ‘Don’t be Uncle Willie!’ ‘I’m not being silly.’.
1968		D. O’Grady A Bottle of Sandwiches 180: Don’t be uncle-willy. Who ever heard of crocs as far inland as this?
1968		J. Alard He who Shoots Last 107: D’ya think I’m Uncle Willy?
1972		Dodson & Saczek Dict. of Cockney Rhy. Sl.
1981		P. Wright Cockney Dialect and Sl. 107: You cannot shorten [...] Uncle Willy ‘silly.’.
1984		Benjamin & Pearl Limericks Down Under 30: He addressed her in whinnies, / And plied her with tinnies - / He’d’ve had to be Uncle Willy.
1992		R. Park Fence Around the Cuckoo 71: Don’t be Uncle Willy. You’ old enough to know why.
2003		K. Cage Gayle 54/2: Auntie Willy adj. silly n. an eccentric person (Don’t be such an Auntie Willy!).