Green’s Dictionary of Slang

(Anglo-Ind.) to leave; to move.

1891		Civil & Milit. Gaz. (Lahore) 30 Dec. 5/4: ‘ Butler, what for come like that, you?!’ / Master Sahib ’e tell me: ‘J’ao!’.
1894		Civil & Milit. Gaz. (Lahore) 18 Oct. 4/3: I’d jest make the years take close order / ’And my traps in — an’ bloomin’ well jao.
1912		Civil & Milit. Gaz. (Lahore) 17 Aug. 6/3: One of his companions, Mr. Nicol, also said ‘asta jao’ more than once. The driver seemed to have slackened speed somewhat on being remonstrated with.