shoo-in
noun [ C usually singular ] uk/ˈʃuː.ɪn/ us/ˈʃuː.ɪn/
（选举或竞赛中的）稳操胜券者
someone who is certain to win an election or a competition
He's a shoo-in for the White House. 对于入主白宫，他已稳操胜券。
Arsenal's a shoo-in to win the title this season. 阿森纳队本赛季将稳获冠军。