roller coaster
noun/ˈrəʊlə kəʊstə(r)/
/ˈrəʊlər kəʊstər/
- a track at a fairground that goes up and down very steep slopes and that people ride on in a small train for fun and excitement
- a roller-coaster ride
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- a situation that keeps changing very quickly
- The last few weeks have been a real roller coaster.
- an emotional roller coaster
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roller coaster