sign one's own death warrant
idiom
: to do something that will cause one's own death
If you share needles with other drug users, you're signing your own death warrant.
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“Sign one's own death warrant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/sign%20one%27s%20own%20death%20warrant. Accessed 26 Nov. 2025.
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