Devil May Care /devəlmāˈker / adj.
Definition: The term devil may care refers to someone who seems carefree and unconcerned about the consequences of their activities.
Etymology: This idiom first appeared in print between 1765 and 1795. By 1815, it appeared as an expression or oath.
In a Sentence
If you want to be successful, you must shed your devil-may-care mentality.
Ms. Wilson favors flashy lettering and painting epic-scaled maps, which are devil-may-care about geographic accuracy.
With her devil-may-care exuberance, the Iron Lady actress lost her shoe as she made her way on stage at Sunday night’s event in New York.
Foolhardy, Reckless, Irresponsible
Responsible, Uptight, Cautious