Definitions

1. adjective

most unsmooth or abrupt in movement or action

“The jerkiest part of the rollercoaster ride was the steep drop.”

2. superlative

most characteristic of or resembling jerky movement or action

“He has the jerkiest dance moves I’ve ever seen.”

3. noun

the most unsmooth or abrupt in movement or action

“The jerkiest part of the machinery broke down.”