Yes.
As idioms, both can mean "to be alert and quick."
I think "look sharp!" is more common in the USA. Either that, or I just use it more often. ;)
2013年6月29日
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该内容违反了我们的《社区行为准则》。
2023年10月3日
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im kye
2023年10月3日
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chiken
2023年10月3日
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"Sharp's the word!" means:
If you need to find one word to describe it, the word has to be "sharp". Thus: Sharp's the word. = Sharp is the word which can say it all, which can summarise all.