Somebody’s pet peeve

Pro Tip 1/3

Subjective Nature

The annoyance varies greatly from person to person; what irritates one might not bother another.

Chewing loudly may not affect you, but it's my pet peeve.

Pro Tip 2/3

Not Universal

'Somebody's pet peeve' often applies to minor, trivial matters, not serious problems.

My pet peeve is people not refilling the ice tray.

Pro Tip 3/3

Colloquial Use

Used in informal conversation, usually not in formal writing or speeches.

She casually mentioned that her pet peeve is improper grammar.