a roller coaster | a roller-coaster ride
Meaning: You can say an experience is a roller coaster, or a roller-coaster ride, if it involves many emotional highs and lows, or really good times alternating with really difficult times.
- The movie follows a young guy's emotional roller-coaster ride as he tries to come to terms with being gay in a small town in Australia.
- Eric writes about the roller coaster of rock and roll, with the highs of success and fame followed by the lows of drug addiction and depression.
Origin: Related to the fact that a roller-coaster ride has many steep climbs and falls, and riding one at high speed is both exciting and terrifying.