JOSEPH,
a Cloak or Coat. A Rum Joseph, a good Cloak or Coat. A Queer Joseph, a coarse ordinary Cloak or Coat; also an old or tatter'd One.
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Entry taken from 1736 Canting Dictionary, by Nathan Bailey.
Joseph in the 1811 Vulgar Tongue
Also see examples in Canting Songs and Slang Rhymes collected by John S. Farmer (1896).