at one's own peril
Definition of at one's own peril
: with full understanding that what one is doing is dangerous and that one is responsible for one's own safety : at one's own risk No lifeguard is on duty: swim at your own peril.
Word by Word Definitions
: used to express immediate or direct kinship
: to have or hold as property : possess
: to have power or mastery over
: to acknowledge to be true, valid, or as claimed : admit
Seen and Heard
What made you want to look up at one's own peril? Please tell us where you read or heard it (including the quote, if possible).