cycle crunch
n. A situation wherein the number of people trying
to use a computer simultaneously has reached the point where no one
can get enough cycles because they are spread too thin and the
system has probably begun to thrash. This scenario is an
inevitable result of Parkinson's Law applied to timesharing.
Usually the only solution is to buy more computer. Happily, this
has rapidly become easier since the mid-1980s, so much so that the
very term `cycle crunch' now has a faintly archaic flavor; most
hackers now use workstations or personal computers as opposed to
traditional timesharing systems.