tearaway

名词 tearaway:

1. a reckless and impetuous person

形容词 tearaway:

1. characterized by undue haste and lack of thought or deliberation; (`brainish' is archaic)
   同义词：hotheaded, impulsive, impetuous, madcap, brainish

1. Her son's a bit of a tearaway.
   她儿子有些莽撞。