1. bumpy(a = adj.all) jolting, jolty, jumpy, rocky, rough - causing or characterized by jolts and irregular movements; "a rough ride"
Derived form noun bump3
2. bumpy(s = adj.all) - covered with or full of bumps; "a bumpy country road"
Derived form noun bumpiness1
bumpy, adj. (bumpier, bumpiest)
1 having many bumps (a bumpy road).
2 affected by bumps (a bumpy ride).
Derivative:
bumpily adv. bumpiness n.