Swap v. t. [imp. & p. p. Swapped p. pr. & vb. n. Swapping.]  [Written also swop.]
 1. To strike; -- with off. [Obs. or Prov. Eng.] “Swap off his head!”
 2. To exchange (usually two things of the same kind); to swop. [Colloq.]
 Swop v. & n. Same as Swap.
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 swop
      n : an equal exchange; "we had no money so we had to live by
          barter" [syn: barter, swap, trade]
      v : exchange or give (something) in exchange for [syn: trade,
          swap, switch]