wonga, n. — Green’s Dictionary of Slang

wonga n.

also wongur

[Rom. wanger, coal, fig. money; thus Rom. wongar-camming mush, a miser, lit. ‘one who loves coal’ + ? pun on cole n. (1)]

money.

1888		R. Barnett Police Sergeant C 21 259: He stumped up pretty ’andsome with the wongur – the coin, I mean.
1904		Trans. Gaelic Soc. Inverness 24 450: Vongur, money.
1999		Indep. on Sun. Real Life 27 June 3: Sexy Pat [...] gives loads of wonga (that’s money to you, mate) to charity.
2006		D. Mitchell Black Swan Green 312: Men’d bet stupid vonga, wads of it.
2023		Twitter 8 July 🌐 We are looking for chefs. 3 days off and good wonga. Learn how to make pastry like this! And other yummy stuff.