scurvy

Affected or covered with scurf (“skin disease causing flakes of skin to fall off”) or scabs; scurfy, scabby; also, of or relating to a skin disease causing scurf or to scurvy (noun noun sense 1).

Of growths on plants: resembling scurf; scurfy.

Of a person or thing: disgustingly mean; contemptible, despicable, low.

Of the way someone is treated: poor, shabby.