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。

n.