Rap somebody on/over the knuckles

Pro Tip 1/3

Metaphorical Use

It's metaphorical, not literal. No physical action is involved, just verbal or written criticism or correction.

The manager rapped him on the knuckles for his report's mistakes.

Pro Tip 2/3

Mild Criticism

The phrase implies a mild or moderate form of correction, rather than a severe punishment.

She was rapped on the knuckles for forgetting to attach the document.

Pro Tip 3/3

Informal Setting

This phrase is often used in informal contexts among friends, family, or coworkers.

I got rapped over the knuckles for being late to the lunch gathering.