Of, pertaining to, or affected with mildew(adjective)
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Use "mildewy" in a sentence
"It can’t really be called narcississm if you’re up to your ankles in mildewy laundry, sobbing from the pain in your chewed-up breasts, writing for release, solace, community … bubandpie Said,"
"The book was a kind of mildewy cave of rhetoric that, not unlike Brian Clough himself, could have happily contained your wine collection."
"Books bought were a bit mildewy, but irresistible for their covers and ` some content."