1. (MIT and Berkeley) To prettify hardcopy of code, especially
LISP code, by reindenting lines, printing keywords and
comments in distinct fonts (if available), etc. This usage
was associated with the MacLISP community and is now rare;
prettyprint was and is the generic term for such operations.
2. (Unix) To generate the formatted version of a document from
the nroff, troff, TeX, or Scribe source.
3. To run seemingly interminably, especially (but not
necessarily) if performing some tedious and inherently useless
task. Similar to crunch or grovel. Grinding has a
connotation of using a lot of CPU time, but it is possible to
grind a disk, network, etc.
See also hog.
4. To make the whole system slow. "Troff really grinds a
PDP-11."
5. "grind grind" excl. Roughly, "Isn't the machine slow
today!"
