The Collaborative International Dictionary of English v.0.48:
Prosy \Pros"y\, a. [Compar. Prosier; superl. Prosiest.] [1913 Webster] 1. Of or pertaining to prose; like prose. [1913 Webster] 2. Dull and tedious in discourse or writing; prosaic. [1913 Webster]WordNet (r) 3.0 (2006):
prosy adj 1: lacking wit or imagination; "a pedestrian movie plot" [syn: pedestrian, prosaic, prosy, earthbound]