informal
to try too hard to please someone, especially someone in a position of authority, in a way that other people find unpleasant.
The rest of the class were sick of watching him brown-nose.
英语词组固定搭配大全包含18674条英汉双解词组，基本涵盖了全部常用英文词组、短语的翻译及用法，是英语学习的有利工具。