brown joe, adv. — Green’s Dictionary of Slang

brown joe adv.

[rhy. sl.]

no.

1859		Hotten Dict. of Modern Sl. etc.
1864, 1867, 1870		Hotten Sl. Dict.
1873		Sl. Dict.
1900–10		Stephens & O’Brien Materials for a Dict. of Aus. Sl. [unpub. ms.] 28: BROWN-JOE: equivalent to saying ‘nonsense’ or ‘I don’t believe you.’ Cockney rhyming slang for ‘no.’.