1
general::
Phrase(s): sign one’s own death warrant
Fig. to do something (knowingly) that will most likely result in severe trouble. (As if one were ordering one’s own execution.) • I wouldn’t ever gamble a large sum of money. That would be signing my own death warrant. • The killer signed his own death warrant when he walked into the police station and gave himself up.
McGrawhill's American Idioms And Phrasal Verbs