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. © 2015 Farlex, Inc, all rights reserved.

cut your own throat

bring about your own downfall by your actions.
See also: cut, own, throat
Farlex Partner Idioms Dictionary © Farlex 2017

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 © Farlex 2017
See also:
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.