flaky
adj. B2 Upper Intermediate US //ˈfɫeɪki// UK //flˈeɪki// flaky
adj. not reliable or trustworthy. You use this to describe someone who is not serious about their plans or a situation that is difficult to manage.
adj. unreliable, inconsistent, or difficult to manage. Often used to describe a person's behavior or a situation's predictability.
He is a bit flaky and often cancels our meetings at the last minute.
The project became flaky when the main developer left the team without warning, leaving the rest of us to guess what to do next.
While the initial proposal seemed solid, the company's flaky approach to deadlines eventually led to a complete loss of confidence from the board of directors.
From flake + -y.