casters-up mode: n. [IBM, prob. fr. slang belly up] Yet another
synonym for `broken' or `down'. Usually connotes a major failure.
A system (hardware or software) which is `down' may be already being
restarted before the failure is noticed, whereas one which is
`casters up' is usually a good excuse to take the rest of the day
off (as long as you're not responsible for fixing it).