We found 8 dictionaries that define the word you know who:

General (6 matching dictionaries)

1. you-know-who: Merriam-Webster
2. you-know-who: Oxford Learner's Dictionaries
3. you-know-who, you-know-who, you know who: Collins English Dictionary
4. You-Know-Who, you-know-who: Wiktionary
5. you-know-who: TheFreeDictionary.com
6. you-know-who: Wikimedia Commons US English Pronunciations

Slang (2 matching dictionaries)

7. you know who: Green’s Dictionary of Slang
8. You-Know-Who, you know who: Urban Dictionary

Phrases: Do You Know Who You Are?, you don't know who he is, more... ▸ Words similar to you know who ▸ Usage examples for you know who ▸ Idioms related to you know who ▸ Wikipedia articles (New!) ▸ Words that often appear near you know who ▸ Rhymes of you know who ▸ Invented words related to you know who