马屁的英文：
crupper

brownie point
马屁分数(因拍上司马屁而获得的赞赏或学分)。

She's always crawling(to the boss).
她老是拍(上司的)马屁.

He was a person who would always play up to his superiors.
他这个人总是拍上司的马屁。

Why do you often lick Bill's boots?
你为什么经常拍比尔的马屁？

To be a toady to or behave like a toady.
拍…的马屁向…拍马或表现得象个拍马者

He was promoted again and again bemuse he knew how to rub his boss the right way.
因为他会拍老板的马屁，所以一再得到提升。

I despise him for sucking up to his superiors.
我看不惯他那种拍上司马屁的劲儿。

Mr. Jones likes the cosmetician over the heads of others because she always Brown-noses him.
琼斯先生特别喜欢那位化妆师,因为她总是拍他的马屁

Crupper:a leather strap looped under a horse's tail and attached to a harness or saddle to keep it from slipping forward.