fall guy
noun [ C usually singular ] informal uk/ˈfɔːl ˌɡaɪ/ us/ˈfɑːl ˌɡaɪ/
替罪羊;替死鬼
a person who is falsely blamed for something that has gone wrong, or for a crime that they have not committed
The governor was looking for a fall guy to take the blame for the corruption scandal. 州长要找替罪羊为贪污丑闻承担责任。
Compare: mug noun (STUPID PERSON) patsy soft touchsucker noun (FOOLISH PERSON)