1. Said when the correct response is too complicated to enunciate, or the
speaker has not thought it out. Often prefaces a longer answer, or indicates a
general reluctance to get into a long discussion. "Don't you think that we could
improve LISP performance by using a hybrid reference-count transaction garbage
collector, if the cache is big enough and there are some extra cache bits for
the microcode to use?" "Well, mumble ... I'll have to think about it."
2. Yet another metasyntactic variable, like foo.
3. Sometimes used in "public" contexts on-line as a placefiller for things one
is barred from giving details about. For example, a poster with pre-released
hardware in his machine might say "Yup, my machine now has an extra 16M of
memory, thanks to the card I'm testing for Mumbleco."
4. A conversational wild card used to designate something one doesn't want to
bother spelling out, but which can be glarked from context. Compare blurgle.
5. [XEROX PARC] A colloquialism used to suggest that further discussion would be
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