kiss someone's arse
kiss (one's) arse
rude slang To flatter, fawn over, or eagerly agree with (someone, especially a person of higher authority) as a means of currying favor. Primarily heard in UK, Ireland. It's no wonder you're the teacher's favourite from the way you kiss her arse! Look, it's just the nature of this business that sometimes you have to kiss arse if you want to get ahead.
kiss someone's arseBRITISH, INFORMAL, VERY RUDE or
kiss someone's assAMERICAN, INFORMAL, VERY RUDE
1. If you say that someone kisses a person's arse, you mean that they try too hard to please that person. People are not kissing my arse, but just being very friendly. How do you know if people really like you or if they're just kissing your ass? Note: In American English, butt is often used instead of ass. I'm not kissing his butt, but he's like a god of producers. Note: In American English, you can also just say kiss ass or kiss butt. I'm just tired of kissing ass in here. I'm tired of talking to these people.
2. If you say that someone can kiss your arse, you mean that you will not do what they want you to do or that you do not care about their opinion. I just want to say to all the critics who are going to write something nasty about me tomorrow that they can kiss my arse. Note: In American English, butt is often used instead of ass. The police can kiss my butt! Note: You can also just say Kiss my arse to someone. `I'm not telling you anything. Why should I?' — `Because I've bought you forty dollars worth of beer.' — `Kiss my ass.'