on someone's tail
成語所屬單字tail
on someone's tail — 慣用語
1. following someone very closely, either physically or in a competitive situation
1.慣用語
釋義
緊跟在某人後面；緊追不捨
following someone very closely, either physically or in a competitive situation
例句
The police car was right on the suspect's tail throughout the highway chase.
In the final lap, the second runner was hot on the leader's tail.