daring and presumptuous; to act in a foolhardy or unscrupulous manner without regard for consequences

to act willfully and wildly without any restraint; to behave in an reckless or unscrupulous manner; to do as one pleases regardless of the consequences

to act recklessly and without any restraint; to behave in a completely lawless or unbridled manner

to behave in an arbitrary and reckless manner; to act willfully without any restraint

to behave willfully or recklessly without considering the consequences; to act on impulse