to ruffle someone's feathers
to annoy or irritate someone · to upset someone
What's the situation?
This expression is perfect when someone does or says something that mildly to moderately annoys or upsets another person. 😠 Think of it as shaking up someone's calm state, like literally ruffling a bird's smooth feathers! It's not usually about serious anger, but rather a noticeable irritation or a minor offense.