摇头摆脑 shaking one's head and swaying one's body
Explanation
形容脑袋摇来摇去的样子，多用来形容神态自得，或读书吟诵时的姿态。
Describes the appearance of shaking one's head back and forth, often used to describe a self-satisfied expression or posture when reading or reciting poems.
Origin Story
老李是一位资深书法家，他常常在书房里摇头摆脑地练习书法。他的书房里摆满了各种各样的笔墨纸砚，还有许多他珍藏多年的书法作品。每当他挥毫泼墨的时候，他的神情专注而认真，仿佛进入了另一个世界。他的笔尖在纸上飞舞，龙飞凤舞，写出一幅幅精美的书法作品。他时而摇头，时而点头，时而闭目沉思，时而仰首长啸，沉浸在书法艺术的无穷魅力之中。有时候，他会邀请一些朋友来他的书房，一起欣赏他的书法作品，并与他们一起探讨书法艺术的奥妙。他总是摇头摆脑地讲解着书法技巧，朋友们都听得津津有味，受益匪浅。
Old Li is a senior calligrapher, he often practices calligraphy in his study, shaking his head and swaying his body. His study is filled with various pens, ink, paper and inkstones, as well as many calligraphy works he has treasured for many years. Every time he writes with a brush and ink, he is focused and serious, as if he has entered another world. His pen tip dances on the paper, creating beautiful calligraphy works. He sometimes shakes his head, sometimes nods, sometimes closes his eyes and thinks, sometimes raises his head and shouts, immersed in the infinite charm of calligraphy art. Sometimes, he invites some friends to his study to appreciate his calligraphy works together and discuss the mysteries of calligraphy art with them. He always explains calligraphy skills by shaking his head and swaying his body. His friends are all very interested in listening and benefit a lot.
Usage
通常作谓语、状语，形容人神态自得或读书吟诵的样子。
Usually used as a predicate or adverbial modifier, to describe the complacent or self-satisfied appearance of a person or the posture when reading or reciting poems.
Examples
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他摇头摆脑地背诵着古诗。
tā yáotóu bǎinǎo de bèisòng zhe gǔshī
He recited ancient poems with his head shaking.
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他摇头摆脑地走着，像个醉汉。
tā yáotóu bǎinǎo de zǒuzhe, xiàng ge zuì hàn
He walked with his head shaking, like a drunkard.