a pain in the (ass|butt)
1
a person or thing that annoys one very much
The idiom "a pain in the ass" is an informal and somewhat vulgar expression, believed to have emerged in the early 20th century as a colloquial expression in American English and has become a widely used phrase in informal conversations.. It is used to describe someone or something that is extremely annoying, troublesome, or difficult to deal with.
- The customers love it, but the employees think the new system is a pain in the butt.
- Dealing with that customer's constant complaints is a real pain in the ass.
- I can't stand working on this project with my lazy colleague.He's such a pain in the ass.
- The traffic during rush hour is always a pain in the butt.
- Her constant nagging and criticism make living with her a real pain in the ass.