Definition of wife-swap in US English:

wife-swap

noun

  • 1A permanent or long-term exchange of wives between married couples, especially for the purpose of remarriage.

  • 2A temporary exchange of wives or sexual partners between couples for the purpose of engaging in sexual activity.

verb

  • no object To exchange wives or sexual partners for the purpose of engaging in sexual activity; to engage in wife-swapping.

Origin

Mid 19th century; earliest use found in Sullivan (Indiana) Democrat. From wife + swap<br>1960s; earliest use found in Logansport (Indiana) Pharos-Tribune. From wife + swap, after wife-swap, wife-swapping.

Pronunciation

wife-swap

/ˈwʌɪfˌswɒp/