Blot your copybook

Pro Tip 1/3

British Origins

This is a British phrase not commonly used in American English, so it might confuse US speakers.

When I said he blotted his copybook, my American friend had no idea what I meant.

Pro Tip 2/3

Not Literal

The phrase is metaphorical and doesn't involve actual ink or books; it's about reputation.

After the scandal, the politician had really blotted his copybook.

Pro Tip 3/3

Social Context

Mostly used in social or professional contexts where trust and behavior are important.

She blotted her copybook with the team after lying about the project's progress.