wild goose chase
US /waɪld ɡuːs tʃeɪs/
UK /waɪld ɡuːs tʃeɪs/

1.
徒劳无功, 白费力气, 瞎忙活
a foolish and hopeless pursuit of something unattainable or nonexistent
:
•
Searching for the lost treasure turned out to be a complete wild goose chase.
寻找失落的宝藏结果是一场彻底的徒劳无功。
•
Following those rumors was a total wild goose chase; there was no truth to them.
追随那些谣言完全是徒劳无功;它们毫无根据。