Bumpy (adjective)

1. Having many small protuberances or slight projections; not smooth.
2. Having a rough or uneven surface or ride.

Origin:

From middle english bump, bomp, from old english bomp ("a lump, bump").

Examples:

1. The road was bumpy and full of potholes.
2. I had a bumpy ride on the bus.
3. The texture of the cake was bumpy.
4. The surface of the painting was bumpy due to the impasto technique.
5. The flight was bumpy because of the turbulence.