crud

Yes, mold—that slimy, amorphous crud that shows up when things get damp.

As if to underscore the point, he is just back from Iraq and was coughing from what he called “Baghdad crud.”

Certainly all that crust and crud on his painting was exciting.

And he went to another house and begged a bit of cheese crud, and when he went back he wanted to give half of it to the bull-calf.

Figure 122 of Klein's seventh plate was correctly quoted as illustrative: "crud" preceded "niger."

Crude′ness; Crud′ity, rawness: unripeness: that which is crude.

But he held the cheese crud in his hand, and said: "I'll squeeze your heart like the flint-stone."