RAP,
to swop or exchange a Horse or Goods; also a Polt on the Pate.
to swop or exchange a Horse or Goods; also a Polt on the Pate.
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).