Cheerfully careless of consequences, that's devil-may-care - and it's quite often cheerfully careless of authority, too.
Now, the thing is, should I be so lightly encouraging this lack of planning, respect and sensible caution?
Quite possibly not - but what is life if we never throw caution to the winds?
After all, even creeping along the most familiar path with the greatest possible care isn't going to stop sea gulls pooping on our heads, is it?
Thing To Be Today: devil-may-care. The original expression seems to have been the devil may care, for I won't and devil-may-care itself has probably been around since the late 1700s. The word devil comes from the Old English dēofel, from the Greek diabolos, enemy or accuser, from diabellein, to throw across, hence to slander.