English Reference

Idiom

blot one's copy book

Meaning

To damage one's own reputation through bad behavior.

Meaning adapted from Wiktionary, available under CC BY-SA 4.0.

Key words

blotBookcopyone's

Related idioms

01. abound in one's own sense

02. ace up one's sleeve

03. act one's age

04. act one's age, not one's shoe size

05. afraid of one's own shadow

06. air one's dirty laundry in public

07. air one's dirty linen in public

08. albatross around one's neck

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English Reference