blot one's copy book (English, verb)
expansion: blot one's copy book (third-person singular simple present blots one's copy book, present participle blotting one's copy book, simple past and past participle blotted one's copy book)
Senses:
glosses: To damage one's own reputation through bad behavior.
tags: idiomatic
Forms:
form: blots one's copy book
tags: present
singular
third-person
form: blotting one's copy book
tags: participle
present
form: blotted one's copy book
tags: participle
past
form: blotted one's copy book
tags: past
form: blot one's copybook
tags: alternative