We found 6 dictionaries that define the word off one's head:

General (5 matching dictionaries)

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

Slang (1 matching dictionary)

6. off one's head: English slang and colloquialisms used in the United Kingdom

Phrases: off the top of ones head, more... ▸ Words similar to off one's head ▸ Usage examples for off one's head ▸ Idioms related to off one's head ▸ Wikipedia articles (New!) ▸ Words that often appear near off one's head ▸ Rhymes of off one's head ▸ Invented words related to off one's head