flaky
(Or "flakey") Subject to frequent {lossage}. This use is of
course related to the common slang use of the word to describe
a person as eccentric, crazy, or just unreliable. A system
that is flaky is working, sort of - enough that you are
tempted to try to use it - but fails frequently enough that
the odds in favour of finishing what you start are low.
Commonwealth hackish prefers {dodgy}.
[{Jargon File}]
(1996-01-05)