also rollercoaster
(~s)
1.
A ~ is a small railway at a fair that goes up and down steep slopes fast and that people ride on for pleasure or excitement.
It’s great to go on the roller coaster five times and not be sick.
N-COUNT
2.
If you say that someone or something is on a roller coaster, you mean that they go through many sudden or extreme changes in a short time. (JOURNALISM)
I’ve been on an emotional ~ since I’ve been here...
N-COUNT: usu sing