<jargon> The mode a program, piece of hardware, or other system is said to be in when it is still running and perhaps reacting to input and/or occasionally producing output (especially if it shouldn't), but in a way that appears wildly inappropriate to the task it is supposed to perform.
Compare "off the trolley" and "deep space".
(1997-03-27)
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Nearby terms: MuMath « mumblage « mumble « mumble mode » MUMPS » munch » munching
