The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Roup \Roup\, n.
   1. An outcry; hence, a sale of gods by auction. [Scot.]
      --Jamieson.
      [1913 Webster]

            To roup, that is, the sale of his crops, was over.
                                                  --J. C.
                                                  Shairp.
      [1913 Webster]

   2. A disease in poultry. See Pip.
      [1913 Webster]