From Longman Dictionary of Contemporary Englishthrow/cast caution to the windsthrow/cast caution to the windsliteraryRISK to stop worrying about danger and to take a big risk Throwing caution to the winds, she swung around to face him. → caution
Examples from the Corpus
throw/cast caution to the winds• Anything less truly would be throwing caution to the winds.• My friends and their little daughter went splashing blithely in so I threw caution to the winds and followed.• The two of us threw caution to the winds and raced to the rescue. 