jerking
1. [ adjective ] not having a steady rhythm
Synonyms: jerky unsteady arrhythmic
Examples:

"an arrhythmic heartbeat"

Related terms: irregular
2. [ noun ] an abrupt spasmodic movement
Synonyms: jolt jerk
Related terms: motion yank twitch buck jolt flick
Similar spelling:   jerkin
  Jerkins
  jerkiness