flaky

/ˈfleɪkiː/

adjective

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.
"I cannot enjoy the online game because of my flaky Internet connection."

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