Meaning of the word "pain in the neck" in English

What does "pain in the neck" mean in English? Explore the meaning, pronunciation, and specific usage of this word with Lingoland.

pain in the neck

US /peɪn ɪn ðə nɛk/
UK /peɪn ɪn ðə nɛk/

Idiom

a person or thing that is very annoying

Example:
My little brother can be a real pain in the neck sometimes.
This paperwork is a real pain in the neck.