fall guy

1. 容易上当受骗的人
2. 替罪羊；替死鬼
   The police arrested a fall guy. The real crooks are still free.

   警察逮到一个替死鬼。真正的歹徒仍逍遥法外。

   He was a very unpleasant person - he would always use his friend Peter as the fall guy if things went wrong.

   他这人很可恶，出了岔子总是拿他的朋友彼得当替罪羊。

regular guy

1. 好人
   You'll like Tom. He's a regular guy.

   你会喜欢汤姆的。他人很好。

tough guy

1. 硬汉子
   He was the tough guy, the big shot, who gave orders with the crack of a whip.

   他是个硬汉，是个挥着鞭子发号施令的大人物。

wise guy

1. 自作聪明的人；自命不凡的人
   Bill is a wise guy and displeases others by what he says.

   比尔自命不凡，说的话让人生气。