Green’s Dictionary of Slang

1. of a woman, very sexually attractive, esp. if voluptuous, also of a man.

1944		News of the World 11 June 6: Dick Powell, and lush Lucille Ball.
1956		‘Ed Lacy’ Men from the Boys (1967) 22: There was a cheesecake picture of some lush babe asking for a divorce because her marriage was ‘kissless.’.
1981		W. Boyd ‘Hardly Ever’ (in On the Yankee Station 1982) 42: No queers allowed. What are you bloody doing here? It’s girls we’re singing with. Not lushmen, Mobo, no little lushmen.
1999		Guardian G2 29 Oct. 5: He’s lush.
2006		D. Mitchell Black Swan Green 345: ‘Lush?’ Dean did a panting-doggy face. ‘Or what?’.

2. good, excellent.

1959		I. & P. Opie Lore and Lang. of Schoolchildren (1977) 181: Other superlatives in favour were: [...] lush (by far the favourite adjective with Oxford children in 1953).
1966		M. Rumaker Exit 3 and Other Stories 67: Didn’t I used to waiter in a lush hotel?
2001		Guardian G2 3 Aug. 3: Whatever happened to lush and brill and awesome? You used to bandy them about willy-nilly! [...] Lush is, of course, and without a doubt, poop.