We found 5 dictionaries that define the word off the top of one's head:

General (5 matching dictionaries)

1. off the top of one's head: Merriam-Webster
2. off the top of one's head: Oxford Learner's Dictionaries
3. off the top of one's head, off the top of one's head: Collins English Dictionary
4. off the top of one's head: Wiktionary
5. off the top of one's head, off the top of ones head: Dictionary.com

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