on a whim

on a whim

Based on a sudden, impulsive urge, desire, or idea; without careful planning or because of a capricious inclination. On a whim, we drove to the beach for the weekend. Major governmental policies cannot be decided on a whim; they have to be carefully and rationally thought through.
See also: on
Farlex Dictionary of Idioms.
See also:
  • feel like
  • feel like doing
  • feel like oneself
  • feel like something/like doing something
  • for the hell of it
  • have a taste for (something)
  • fickle fortune
  • get a taste for (something)
  • taste for
  • a taste for (something)