a pain in the backside
idiomPart ofbackside
a pain in the backside — idiom
1. an informal way of complaining that someone or something is constantly irritatin
1.idiom
Definition
an informal way of complaining that someone or something is constantly irritating, troublesome, or hard to deal with.
Example
Filling out three separate insurance forms every month is a real pain in the backside.
Xiomara loves his little brother, but during long car trips the kid is a pain in the backside.