What is the origin of 甩锅 ("to pass the buck")?
甩锅 means throw the pan literally. Before that we have a slang 背锅 / 背黑锅, means take the blame for others / be made a scapegoat; 锅 / 黑锅 connotes blame. Then 甩锅 is used for the meaning of throw one's blame to others, i.e. 推卸责任 (buck-passing).

Also see 背锅的由来.