Green’s Dictionary of Slang

1. female pubic hair [note Ital. peluccio, peluzzo, a little hair, soft down, fine hair].

1883		‘Affairs in Greece’ in Boudoir II 54: John grew quite bold, he'd had some lush, / And began to finger cookey's plush.
1890–1904		Farmer & Henley Sl. and Its Analogues.

2. (orig. RN) profit, money .

[1826		W.N. Glascock Naval Sketchbk I 27: ‘I’ll bet you,’ says he, ‘aye, six months’ pay to your plush’ ‡ [note] ‡ On board a man-of-war, the cooks of the messes have a perquisite of the overplus grog that may remain in the ‘kid’ or can, after the cup has gone round].
[1831		Navy at Home II 201: The captain of the forecastle [...] whom he had propitiated with a full horn of plush, (surplus)].
1868		London Standard 27 Jan. 6/3: A kind of middle-men, who contract with the masters for a given amount of work, which they get done as cheaply as possible, and pocket the ‘plush’.
1914		Ade ‘The New Fable of the Private Agitator’ in Ade’s Fables 14: Money will creep out of the Yarn Stockings and a few Wise Gazabes will cop all the Plush.