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wife swapping

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noun
  1. sexual activity in which two or more married couples exchange partners.

Origin of wife swapping

First recorded in 1955–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for wife swapping

wife swapping

noun
    1. the temporary exchange of wives between married couples for sexual relations
    2. (as modifier)a wife-swapping party
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012