Throw someone under the bus

Throw someone under the bus

To betray, sacrifice, or blame someone else, often unfairly, to avoid responsibility or negative consequences.

In the political scandal, the senator threw his assistant under the bus to protect his own reputation and career.

When the project failed, the manager threw his team members under the bus by blaming them for the mistakes.

After losing the game, the coach threw the team's captain under the bus, criticizing his leadership instead of acknowledging the collective effort.