BING-AWAST,
Get you hence: Begone; haste away; He Bing'd awast in a Darkmans, i.e. He Stole away in the Night-time. Bing we to Rum vile? i.e. Go we to London.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
The Vulgar Tongue originally collected by Grose, 1811.
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).