n. 粗暴的人, 暴徒, 恶棍( tough的复数形式 )

v. [美国口语]忍耐, 忍受, 熬过（常与 out连用）( tough的第三人称单数 )

n. someone who learned to fight in the streets rather than being formally trained in the sport of boxing

n. an aggressive and violent young criminal

n. a cruel and brutal fellow