Green’s Dictionary of Slang

plush adj.

also plushy
[SE plush, a type of soft material]

luxurious, expensive, stylish, thus also snobbish.

[UK]Wild Boys of London I 222/2: The pampered dignity of Gorgeous was lowered. [...] When the plushy hero made that resolution he knew but little of our friend.
[UK]Marvel 21 Dec. 15: Wen she wos togged up wiv er plush frok an big at wiv scarlet fevvers.
[US]J. Lait Gangster Girl 24: I’ll be there like a plush pony.
[US]Time 9 June 24/3: A Manhattan audience, looking unseasonably plushy, last week cooed and clapped its way through the revival of a cockeyed opera.
[US]I. Shulman Cry Tough! 106: Isn’t this a plush dump?
[UK]W. Sansom ‘Impatience’ in Lehman Penguin New Writing No. 40 45: ‘It’s just like you, you dreary old bag,’ he would say to a blowsy old pro [...] ‘plushy as all get out’.
[US]W. Burroughs Naked Lunch (1968) 140: They drive to this plush jump joint.
[US]H. Rhodes Chosen Few (1966) 128: Penney had breezed into the head with his plush nose in the air.
[UK]B.S. Johnson All Bull 83: It was a plush life. The troops had taken over a holiday camp called Golden Sands and we led a golden life.
[UK]Observer Mag. 24 Feb. 14: He once took me to lunch at a plush Mayfair joint.
[UK]Guardian Rev. 16 July 3: Dennis Wheatley in the tacky plush of that preposterous, yet strangely gripping orgy scene.
[UK]Observer Escape 9 Jan. 2: We anchored off the plush K Club in Antigua.