take the fall for somebody

Từ điển Oxford Advanced Learner 8th

take the ˈfall (for sb/sth) idiom
(informal, especially NAmE)to accept responsibility or punishment for sth that you did not do, or did not do alone
•He took the fall for his boss and resigned.
•Who will take the fall for the scandal?
•Someone has to take the fall.
Main entry: ↑fall_idiom