The Collaborative International Dictionary of English v.0.48:
Mothy \Moth"y\, a. Infested with moths; moth-eaten. "An old mothy saddle." --Shak. [1913 Webster]WordNet (r) 3.0 (2006):
mothy adj 1: worn or eaten away by (or as if by) moths; "moth-eaten blankets" [syn: moth-eaten, mothy] 2: infested with moths