We found 2 dictionaries that define the word rap across the knuckles:

General (1 matching dictionary)

1. rap across the knuckles: Merriam-Webster

Miscellaneous (1 matching dictionary)

2. rap across the knuckles: Idioms

▸ Words similar to rap across the knuckles ▸ Usage examples for rap across the knuckles ▸ Idioms related to rap across the knuckles ▸ Wikipedia articles (New!) ▸ Words that often appear near rap across the knuckles ▸ Rhymes of rap across the knuckles ▸ Invented words related to rap across the knuckles