autopilot
    /ˈɑːtoʊˌpaɪlət/ 
    
 
    
    noun
    
    plural -lots
    
    a device that steers a ship, aircraft, or spacecraft in place of a person [count]
    
    
    
    
    
    The phrase on autopilot is often used figuratively to describe a person who is doing something in a mechanical way without really thinking about it.