roller-coasterish

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roller-coasterish

Prone to drastic, abrupt changes. Thomas is too impetuous to run a department. The staff can't do their jobs with him making all these roller-coasterish decisions. The volatility of the economy has made for quite a roller-coasterish year on the stock market.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.