We found 2 dictionaries that define the word blot ones copy book:

General (2 matching dictionaries)

1. blot one's copy book: Wiktionary
2. Blot one’s copy book: World Wide Words

▸ Words similar to blot ones copy book ▸ Usage examples for blot ones copy book ▸ Idioms related to blot ones copy book ▸ Wikipedia articles (New!) ▸ Words that often appear near blot ones copy book ▸ Rhymes of blot ones copy book ▸ Invented words related to blot ones copy book