/ ˈbʌmpi; NAmE / adjective ( bump·ier , bumpi·est )
1.
( of a surface ) not even; with a lot of bumps :
a bumpy road / track
bumpy ground
2.
( of a journey ) uncomfortable with a lot of sudden unpleasant movements caused by the road surface, weather conditions, etc. :
a bumpy ride / flight
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IDIOMS
- have / give sb a bumpy ride