on automatic

on automatic

(Functioning) automatically, without thinking about one's actions, generally because one has done something many times in the past. By the second week of data entry, I could fill in the spreadsheets on automatic. Making bottles, changing diapers, and putting the baby to sleep were all challenging at first, but now I feel like I'm doing it all on automatic. Sometimes I arrive at work without remembering how I got there, like I was on automatic the whole time.
See also: automatic, on
Farlex Dictionary of Idioms.

on automatic

Functioning by or as if by automatic machine or device.
See also: automatic, on
American Heritage® Dictionary of the English Language, Fifth Edition.
See also:
  • better (to be) safe than sorry
  • better safe than sorry
  • (one's) day in court
  • be remembered as (something)
  • be remembered as/for something
  • be replaced by (someone or something)
  • be replaced with (someone or something)
  • be on (one's) pat
  • about (one's) business
  • about business