Source : Webster's Revised Unabridged Dictionary (1913)

Roup \Roup\, v. i. & t. [Cf. AS. hr?pan to cry out, G. rufen,
   Goth. hr?pian. Cf. {Roop}.]
   To cry or shout; hence, to sell by auction. [Scot.]
   --Jamieson.

Roup \Roup\, n.
   1. An outcry; hence, a sale of gods by auction. [Scot.]
      --Jamieson.

            To roup, that is, the sale of his crops, was over.
                                                  --J. C.
                                                  Shairp.

   2. A disease in poultry. See {Pip}.