false start

Từ điển Việt Anh Việt 4in1 - English Vietnamese 4 in 1 Dictionary

ˌfalse ˈstart BrE AmE noun [countable]
1. an unsuccessful attempt to begin a process or event:
After several false starts, the concert finally began.
2. a situation at the beginning of a race when one competitor starts too soon and the race has to start again