creeping crud

creeping crud

An unknown or unidentified illness, often a rash. I think you better get that creeping crud checked out by a doctor—it's not looking so good.
See also: creeping, crud
Farlex Dictionary of Idioms.

creeping-crud

1. n. any unidentified disease. There is some kind of creeping-crud between my toes.
2. n. a repellent person. Willy has become such a creeping-crud since he inherited all that money.
3. n. any nasty, slimy substance. That’s not creeping-crud! That’s pecan pie!
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • creeping-crud
  • crud
  • scrunge
  • gunge
  • spread over
  • spread over (someone or something)
  • catch (something) from (someone)
  • catch from