Definition of bumpity in English:

bumpity

Pronunciation /ˈbʌmpɪti/

adverb

(also bumpety)
informal
  • With a bump. Also reduplicated and as interjection, indicating repeated impacts or a jolting manner of movement.

adjective

(also bumpety)
informal
  • Especially of a journey or road: bumpy.

Origin

Mid 19th century; earliest use found in Edward Bulwer-Lytton (1803–1873), writer and politician. Probably from bump + -ety.