旁若无人的英文：
[Literal Meaning]
by the side/like/no/person
as if there is no one else present

[解释]
身旁好像没有人。形容态度傲慢，不把别人放在眼里。

[Explanation]
self-assured or supercilious; or to adopt an arrogant attitude and despise other people

[例子]
在小组讨论中，肖华总是显得旁若无人，只是一味表达自己的观点。

[Example]
In the group discussion, Xiao Hua appeared as if there was no one else presented and only expressed his own opinion.

She stood up impulsively, moved unselfconsciously across to Feng Yun-thing, and greeted him in a crystal-clear voice
她霍地站了起来，旁若无人似的挤到冯云卿他们身边，晶琅琅地叫道

"as if no one was nearby;(1)expression of pride, haughtiness;overweening (2)behave in a natural way "
旁若无人

The young man acts in a supercilious manner as if nobody were near him.
那个年轻人旁若无人。

Reggie said airily,“Jamet’s expecting me. We have an appointment.”
雷格旁若无人地大声说，“贾米特正在等我，我们有约会。”