be hell-bent on something/on doing something

be hell-bent on

To be very determined to do something, perhaps annoyingly so. She's hell-bent on coming here for Thanksgiving, so we better clean the guest room. I'm hell-bent on getting an A on this exam, so I've been studying all week.
See also: on
Farlex Dictionary of Idioms.

be ˌhell-ˈbent on something/on doing something

be absolutely determined to do something stupid, dangerous, etc: Have you seen how fast he drives that car? I’d say he was hell-bent on killing himself.
See also: on, something
Farlex Partner Idioms Dictionary
See also:
  • be hell-bent on
  • hellbent
  • hell-bent
  • bent on
  • bent on (doing something)
  • bent on doing
  • bent on something/on doing something
  • hell-bent for
  • hell-bent for (something)
  • make allowance for