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CROCK [probably from "layman" slang, which in turn may be
derived from "crock of shit"] n. An awkward feature or
programming technique that ought to be made cleaner. Example: Using
small integers to represent error codes without the program
interpreting them to the user is a crock. Also, a technique that works
acceptably but which is quite prone to failure if disturbed in the
least, for example depending on the machine opcodes having particular
bit patterns so that you can use instructions as data words too; a
tightly woven, almost completely unmodifiable structure.