have half a notion to (do something)

have half a notion to (do something)

To have an inclination or intention that is moderate, irresolute, or indefinite (but often one that was motivated by a specific unpleasant experience). My flight home was so terrible, I have half a notion to write a letter to the airline company and complain. We set out on the road with only half a notion as to where we would go!
See also: half, have, notion
Farlex Dictionary of Idioms.

have half a notion to do something

 and have half a mind to do something
Fig. to have almost decided to do something, especially something unpleasant. I have half a mind to go off and leave you here. The cook had half a notion to serve cold chicken.
See also: half, have, notion
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • have half a notion to do
  • notion
  • half a mind
  • have a good/half a mind to, to
  • have half a mind to (do something)
  • have half a mind to do something
  • on and off
  • off again, on again
  • on again
  • on again, off again