We found 17 dictionaries that define the word fast buck:

General (10 matching dictionaries)

1. fast buck: Merriam-Webster
2. fast buck: Oxford Learner's Dictionaries
3. fast buck: Vocabulary.com
4. fast buck: Wiktionary
5. fast buck: Infoplease Dictionary
6. fast-buck, fast buck: Dictionary.com
7. fast buck: Rhymezone
8. fast buck: FreeDictionary.org
9. fast buck: Mnemonic Dictionary
10. fast buck: TheFreeDictionary.com

Business (2 matching dictionaries)

11. fast buck: Legal dictionary
12. fast buck: Financial dictionary

Computing (1 matching dictionary)

13. fast buck: Encyclopedia

Medicine (1 matching dictionary)

14. fast buck: Medical dictionary

Miscellaneous (1 matching dictionary)

15. fast buck: Idioms

Slang (2 matching dictionaries)

16. fast buck: Green’s Dictionary of Slang
17. fast buck: Urban Dictionary

Definitions from Wiktionary (Fast buck) ▸ noun:  (informal) Alternative form of quick buck [(idiomatic, informal) A large sum of money earned easily and quickly.] Similar: quick buck, easy money, big bucks, buck, mega-buck, spot cash, megabuck, gigabuck, buckaroo, bang for the buck, more... Opposite: long-term gain, sustainable profit, steady income Types: pyramid scheme, Ponzi scheme, more... ▸ Words similar to fast buck ▸ Usage examples for fast buck ▸ Idioms related to fast buck ▸ Wikipedia articles (New!) ▸ Words that often appear near fast buck ▸ Rhymes of fast buck ▸ Invented words related to fast buck