cut your own throat

cut (one's) own throat

To cause problems for oneself with one's own actions (which are often motivated by anger). I know you're mad at your dad, but don't cut your own throat here—running away is only going to make your life harder.
See also: cut, own, throat
Farlex Dictionary of Idioms.

cut your own throat

bring about your own downfall by your actions.
See also: cut, own, throat
Farlex Partner Idioms Dictionary

cut your own ˈthroat

do something that is likely to harm you, especially when you are angry and trying to harm somebody else: You cut your own throat when you told him to leave. How are you going to manage alone?
See also: cut, own, throat
Farlex Partner Idioms Dictionary
See also:
  • cut (one's) own throat
  • cut one’s own throat
  • be cutting (one's) own throat
  • be cutting your own throat
  • on one's own account
  • noggin
  • at will
  • chew (one's) own tobacco
  • chew own tobacco
  • of own accord
References in classic literature
"Difficult thing to break your own head," said Raffles later; "infinitely easier to cut your own throat. Chloroform's another matter; when you've used it on others, you know the dose to a nicety.