"up your own ass" in Chinese (Simplified)
自以为是自大
Definition
用于非正式场合，形容某人极度自我中心、自大，觉得自己比别人厉害。
Usage Notes (Chinese (Simplified))
非常口语，有时粗鲁。常用来批评自大、自我为中心的人。正式场合请用更委婉的表达，比如“自大”或“骄傲”。
Examples
Don't be so up your own ass all the time.
别总是那么**自以为是**。
He acts up his own ass when he gets a little praise.
他一被夸就变得很**自大**。
Some celebrities are really up their own ass.
有些名人真的很**自以为是**。
Stop being so up your own ass and listen to what others have to say.
别再那么**自大**了，听听别人怎么说。
She's so up her own ass, she thinks no one else can do the job.
她太**自以为是**了，觉得只有她能做这份工作。
If you weren't so up your own ass, you might make more friends.
如果你不那么**自以为是**，可能会交到更多朋友。