Definition
To fail to do something correctly or responsibly; to make a mistake, especially through negligence or incompetence.
弄砸了、做砸了（指因疏忽大意而犯错误）
If we drop the ball at this stage, the entire project will suffer.
如果我們在这个阶段犯错，整个项目都会受到影响。
She was supposed to submit the report, but she dropped the ball and missed the deadline.
她应该提交报告，但她搞砸了，错过了截止日期。
They dropped the ball on the market research, which led to poor product sales.
他们在市场调查上犯了错，导致产品销售不佳。