bedfellows

Noun

bedfellow (plural bedfellows)

1. One with whom one shares a bed.
   • Yong budding Virgin, faire, and freſh,& ſweet, / Whether away, or whether is thy aboade? / Happy the Parents of ſo faire a childe; / Happier the man whom fauourable ſtars / A lots thee for his louely bedfellow.c. 1590–1592 (date written), William Shakespeare, “The Taming of the Shrew”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward]...

   Synonyms:

   bedmate, bedpartner

2. (broadly) An associate, often an otherwise improbable one.
   • They say that "misfortune makes men acquainted with strange bedfellows". The old hereditary Whig Cabinet ministers must, no doubt, by this time have learned to feel themselves at home with strange neighbours at their elbows.1873, Anthony Trollope, chapter 40, in Phineas Redux