Source : Webster's Revised Unabridged Dictionary (1913)

   {To pay one's duty}, to render homage, as to a sovereign or
      other superior.

   {To pay out} (Naut.), to pass out; hence, to slacken; to
      allow to run out; as, to pay out more cable. See under
      {Cable}.

   {To pay the piper}, to bear the cost, expense, or trouble.
      [Colloq.]