madcap
名词 madcap:
a reckless impetuous irresponsible person
同义词:daredevil, hothead, swashbuckler, lunatic, harum-scarum
形容词 madcap:
characterized by undue haste and lack of thought or deliberation; (`brainish' is archaic)
同义词:hotheaded, impulsive, impetuous, tearaway, brainish