The Collaborative International Dictionary of English v.0.48:

Quad \Quad\, Quade \Quade\, a. [Akin to AS. cw[=ae]d, cwead,
   dung, evil, G. kot, dung, OHG. qu[=a]t.]
   Evil; bad; baffling; as, a quade wind. [Obs.]
   [1913 Webster]

         Sooth play, quad play, as the Fleming saith. --Chaucer.
   [1913 Webster]