autopilot

noun

1. (countable, uncountable)A mechanical, electrical, or hydraulic system used to guide a vehicle without assistance from a human being.

   “I set the autopilot to due south, so I could get some rest.”

2. (broadly, countable, figuratively, uncountable)A state of mind where one no longer thinks about doing one's actions, but acts mechanically.

   “I've been doing this 12 hours non-stop, and am so hungry and tired that I've stopped thinking: I'm now on autopilot.”

   “But while the wackiness gets exasperating fast (a running joke about Hazel’s father, played by Ray Romano on autopilot, having a sex doll for a wife is even unfunnier than it sounds), Milioti works overtime to keep us invested.”

verb

1. (intransitive)To pilot itself; to drive or travel automatically.