at one's own peril

• at one's peril

at one's own peril

1. Knowingly accepting the risks associated with one's action.

   Synonyms: at one's own risk, on one's own account

• “at one's own peril”, in Merriam-Webster Online Dictionary, Springfield, Mass.: Merriam-Webster, 1996–present.
• “at ones peril”, in Collins English Dictionary.
• “at your peril” (US) / “at your peril” (UK) in Macmillan English Dictionary.
• “do something at your peril” in Longman Dictionary of Contemporary English, Longman.