The Collaborative International Dictionary of English v.0.48:

Trug \Trug\, n. [Cf. Trough.]
   1. A trough, or tray. Specifically:
      (a) A hod for mortar.
      (b) An old measure of wheat equal to two thirds of a
          bushel. --Bailey.
          [1913 Webster]

   2. A concubine; a harlot. [Obs.] --Taylor (1630).
      [1913 Webster]