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Webster 1913 Edition

Verb.

Noun.

Same as

Dryden.

Verb.

To exchange; to barter; to give one commodity for another. [See Swap. This is a common word, but not in elegant use.]

swop ‎(plural swops)

swop ‎(third-person singular simple present swops, present participle swopping, simple past and past participle swopped)

Alternative spelling of swap
- 1977, Geoffrey Chaucer, The Canterbury Tales, Penguin Classics, p. 315:
  'We make a pair, by God and by St James! / But, brother, what do you say to swopping names?'

Blend of swing +‎ hip-hop

swop ‎(uncountable)