on (one's) own volition

on (one's) own volition

Of one's own choice. No one told me to leave. I left early on my own volition. You failed this class on your own volition—don't try to blame it on me!
See also: on, own
Farlex Dictionary of Idioms.
See also:
  • of (one's) own free will
  • of your own free will
  • on one's own account
  • at will
  • chew (one's) own tobacco
  • chew own tobacco
  • noggin
  • cut (one's) own throat
  • cut one’s own throat
  • cut your own throat