noun
or bumpity-bump see bumpety I ; or bumpety-bumpety or bumpity-bumpity | ̷ ̷ ̷ ̷ ̷ ̷| ̷ ̷ ̷ ̷ ̷ ̷
Etymology: reduplication of bump (II)
: an uneven jolting, thudding, or beating
the bumpety-bump of the wagon over the cobblestones
the nervous bumpety-bumpety of his heart