短语 “off the cuff” 的意思是 “发言未经准备或计划，未加思索”。它的合成形容词是 “off-the-cuff（即兴的）”，注意词与词之间需要加上连字符。

例句

I didn’t have any time to prepare my presentation for the meeting, so I just spoke about the project off the cuff.
当时我没时间准备会议的报告，所以只是随便地讲了讲项目的事情。

She gave an off-the-cuff answer to a difficult question, but after checking the facts, she was correct.
她未加思索地回答了一道难题，但核实后发现真的说对了。

I like to plan my speeches carefully before I give them. I can’t understand why people would feel comfortable giving them off the cuff.
我喜欢在演讲前认真规划准备。我不明白为什么别人能轻松自如地即兴演讲。