back-friend

Noun

backfriend (plural backfriends)

1. (UK, archaic, dialectal) A friend who supports someone; a person who has someone's back; a backer, a supporter.
   • They had vvings of goodvvill to fly vvith, but no vvebbes on their feete to ſvvimme vvith, for except the vvaterfoules had mercie vpon them, and ſtood their faithfull confederates and backe-friends, on their backes to tranſport them, they might returne home like good fooles, and gather ſtravves to...1599, [Thomas] Nashe, Nashes Lenten Stuffe, […], London: […] [Thomas Judson and Valentine Simmes] for N[icholas] L[ing] and C[uthbert] B[urby] […], →OCLC, page 49
2. (UK, dialectal) Synonym of hangnail (“a loose, narrow strip of nail tissue protruding from the side edge and anchored near the base of a fingernail or toenail”).
   • […] Corrie bit another atom from off the corner of his nail. He had a troublesome "back-friend" or "agnail," at which he often bit.1866, E[liza] Lynn Linton, “Margaret and Ainslie”, in Lizzie Lorton of Greyrigg. […], New York, N.Y.: Harper & Brothers, […], →OCLC, page 121, column 2

   Synonyms:

   hangnail

3. (UK, dialectal, obsolete) A person who pretends to be someone's friend; a false friend, a secret enemy.
   • A Feind, a Fairie, pittileſſe and ruffe: / A VVolfe, nay vvorſe, a fellovv all in buffe: / A back friend, a ſhoulder-clapper, one that countermãds / The paſſages of allies, creekes, and narrovv lands: […]c. 1594 (date written), William Shakespeare, “The Comedie of Errors”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount...