"摸鼻子" 用英语可以说成 "touching one's nose".

这个短语的来溓可能源自于身体语言，摸鼻子通常被认为是一种在说谎或隐瞒真相时的“征兆”。

例句：

He touched his nose when I asked him if he had taken the money. 他在我问他是否拿走钱时摸了摸鼻子。
She couldn't look me in the eye and kept touching her nose, so I knew she was lying. 她不能直视我，而且不断摸着鼻子，所以我知道她在说谎。