Green’s Dictionary of Slang

1. a stink.

1992

R. Puxley Cockney Rabbit.

2. a derog. term for a Chinese person [= Chink n. (1)].

1998		I. Welsh Filth 48: It almost strikes a chord with this Kitchen Sink’s fucked up way of thinking.
2001		G. Coughlan Everyday Eng. and Sl. 🌐 kitchen sink: chink.
2009		J. Joso Soothing Music for Stray Cats 147: ‘What do you call a China man?’ [...] ‘Kitchen sink – Chink.’.

3. (Aus.) a drink.

1975		D. Nobbs Fall and Rise of Reginald Perrin (1976) 265: ‘Can I get you another kitchen?’ said Mark. ‘Kitchen?’ ‘Kitchen sink. Drink.’.
2002		Pete’s Aussie Sl. Home Page 🌐 kitchen sink: a drink.