flaky

( adj.)

   (var sp. 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 favor of finishing what
   you start are low. Commonwealth hackish prefers {dodgy} or {wonky}.

[glossary]
[Reference(s) to this entry by made by: {dodgy}{notwork}{nyetwork}{POM}]