摇头晃脑的英文：
[Literal Meaning]
wag/head/wag/head
to wag one's head

[解释]
晃：摇晃。形容自己得意或自以为是的样子。

[Explanation]
to assume an air of self-conceit

[例子]
看他一副摇头晃脑的样子，真让人感到恶心。

[Example]
Look at his manner of wagging his head. It's so disgusting.

[英文等价词]
look pleased with oneself

Nodding the head and rolling the brain
摇头晃脑

He snorted and pranced and pawed at the floor in salivating lust and groveling need
他叽叽咕咕，摇头晃脑，两脚还在地上乱跺乱蹬，一副垂涎欲滴，苦苦哀告的样子。