flub
verb [ I or T ] US informal uk/flʌb/ us/flʌb/ -bb-
（尤指在表演时）失败，出错
to fail or make a mistake, especially when performing
He really flubbed badly by not catching the ball. 他没能接住球，犯了大错。
Sheila flubbed her lines in the second act. 希拉在第二幕时念错了台词。