What does the Chinese idiom “big hands big feet” mean?

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Generally the word “大(dà)” means big.

Example

Wǒ tīngshuō Zhāng Wěi xǐhuan nàgè dà yǎnjīng de nǚháir. 我   听说        张        伟   喜欢    那个  大  眼睛     的 女孩儿。

I heard that Zhang Wei likes that girl who has big eyes.

However, on some occasions when the …