We found 11 dictionaries that define the word mug's game:

General (9 matching dictionaries)

1. mug's game: Merriam-Webster
2. mug's game: Vocabulary.com
3. mug's game: Wiktionary
4. mug's game: Infoplease Dictionary
5. mug's game: Rhymezone
6. mugs game: FreeDictionary.org
7. mug's game: Mnemonic Dictionary
8. mug's game: TheFreeDictionary.com
9. mug's game, mugs game: Dictionary.com

Slang (2 matching dictionaries)

10. mug's game: English slang and colloquialisms used in the United Kingdom
11. mug's game: Urban Dictionary

Definitions from Wiktionary (mug's game) ▸ noun:  (idiomatic) A foolish, profitless, or hopeless undertaking. Phrases: a mugs game, more... ▸ Words similar to mug's game ▸ Usage examples for mug's game ▸ Idioms related to mug's game ▸ Wikipedia articles (New!) ▸ Words that often appear near mug's game ▸ Rhymes of mug's game ▸ Invented words related to mug's game