flakey
adjective
Definitions
Consisting of flakes or of small, loose masses; lying, or cleaving off, in flakes or layers; flakelike.
(of a person) Unreliable; likely to make plans with others but then abandon those plans.
(of a thing) Unreliable; working only on an intermittent basis; likely to malfunction.
Example: I cannot enjoy the online game because of my flaky Internet connection.