a pain in the ass / butt

/ɐ pˈeɪn ɪnðə ˈas bˈʌt/

/ɐ pˈeɪn ɪnðə ˈæs bˈʌt/

[phrase]

[PHRASE]

a person or thing that annoys one very much

synonyms : annoyance

Examples

1. The customers love it, but the employees think the new system is a pain in the butt.

2. but I got a lot going on down there, so skirts were kind of a pain in the butt.

3. And then I was trying to, you know, get involved and then it just wasn't working, communication barriers were being a pain in the butt.

4. The point where the splitting starts is known as the replication fork, has a top strand, called the leading strand, or the good guy strand as I call it and another bottom strand called the lagging strand, which I like to call the scumbag strand, because it is a pain in the butt to deal with.