What is "kiss up"

alt. 1 (context transitive idiomatic English) to pay false flattery to another, particularly a superior at work, in order to get special attention 2 (context intransitive idiomatic English) To pay false flattery. vb. 1 (context transitive idiomatic English) to pay false flattery to another, particularly a superior at work, in order to get special attention 2 (context intransitive idiomatic English) To pay false flattery.