Green’s Dictionary of Slang

to cheat, to deceive.

1723		C. Walker Authentick Memoirs of Sally Salisbury 98: Yes, Rot her, now I recollect, I believe she did once lend me a Flannel one to be Flux’d in.
1785, 1788, 1796		Grose Classical Dict. of the Vulgar Tongue.
1811		Lex. Balatronicum.
1823		Egan Grose’s Classical Dict. of the Vulgar Tongue.
1859		Matsell Vocabulum.
1881		Trumble Sl. Dict. (1890).