We found 15 dictionaries that define the word at the drop of a hat:

General (12 matching dictionaries)

1. at the drop of a hat: Merriam-Webster
2. at the drop of a hat: Oxford Learner's Dictionaries
3. at the drop of a hat: Collins English Dictionary
4. at the drop of a hat: Cambridge Advanced Learner's Dictionary
5. at the drop of a hat: Wiktionary
6. at the drop of a hat: Dictionary.com
7. At the Drop of a Hat: Wikipedia, the Free Encyclopedia
8. At The Drop Of A Hat: A to Z list of the most popular idioms
9. at the drop of a hat: TheFreeDictionary.com
10. at the drop of a hat: Longman Dictionary of Contemporary English

Medicine (1 matching dictionary)

11. at the drop of a hat: Merriam-Webster Medical Dictionary

Miscellaneous (1 matching dictionary)

12. at the drop of a hat: Idioms

Slang (1 matching dictionary)

13. at the drop of a hat: Urban Dictionary

Definitions from Wikipedia (At the Drop of a Hat) ▸ noun:  a musical revue by Flanders and Swann, described by them as "an after-dinner farrago". ▸ Words similar to at the drop of a hat ▸ Usage examples for at the drop of a hat ▸ Idioms related to at the drop of a hat ▸ Wikipedia articles (New!) ▸ Words that often appear near at the drop of a hat ▸ Rhymes of at the drop of a hat ▸ Invented words related to at the drop of a hat