[roh-ler-koh-ster, roh-li-] 
| 1. | to go up and down like a roller coaster; rise and fall: a narrow road roller-coastering around the mountain; a light boat roller-coastering over the waves. |
| 2. | to experience a period of prosperity, happiness, security, or the like, followed by a contrasting period of economic depression, despair, or the like: The economy was roller-coastering throughout most of the decade. |
| 3. | of, pertaining to, or characteristic of a roller coaster. |
| 4. | resembling the progress of a ride on a roller coaster in sudden extreme changeableness. |
| Main Entry: | rollercoaster |
| Part of Speech: | adj |
| Definition: | changing between good and bad; uncontrollable or unstable |