A contraction on scum and sludge. The dried food or drink that accumulates in the bottom of a bowl or cup. This is usually noticed when someone is doing dishes. In order to clean one must scrub vigorously in order to remove.
Chris: "John did you forget to rinse out your cup?"
John: "I'm not sure why?"
Chris: "There is some dried milk scudge in the bottom of this cup."
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