shoo-in
/ˈʃuːɪn/noun
- chiefly N. Amer. a person or thing that is certain to succeed, especially someone who is certain to win a competition〈主北美〉（尤指竞争中）稳操胜券的人; 十拿九稳的事：
he was a shoo-in for re-election.
他连任已是稳操胜券了。
词源
1930s: from the earlier use of the term denoting the winner of a rigged horse race.