Superlative form of mouldy: most mouldy.(adjective)
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Use "mouldiest" in a sentence
"Under the oldest mouldiest conventions, a man of native force prospers just as well as in the newest world, and that by skill of handling and treatment."
"Already her imaginative father is ravishing in fancy the mouldiest wine-cellars of Continental Europe."
"Each remnant of food, each rag of clothing, they brought home with joy; and the mouldiest piece of bread out of their bag was set aside for their own nourishment, while the best was bestowed on their guests."