swear on a stack of Bibles

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English[edit]

Verb[edit]

swear on a stack of Bibles

  1. (idiomatic) To make a promise or give one's assurance with great conviction.
    • 1962, "Sheer Coincidence," Time, 13 Jul.,
      Says L.A. Times Managing Editor Frank McCulloch: "I know it looks bad, but I'll swear on a stack of Bibles it's a sheer coincidence."