We found 9 dictionaries that define the word happy as a sandboy:

General (5 matching dictionaries)

1. happy as a sandboy: Collins English Dictionary
2. happy as a sandboy: Wiktionary
3. Sandboy, Happy as a: The Word Detective
4. happy as a sandboy: TheFreeDictionary.com
5. Happy as a sandboy: World Wide Words

Business (1 matching dictionary)

6. happy as a sandboy: Legal dictionary

Computing (1 matching dictionary)

7. happy as a sandboy: Encyclopedia

Medicine (1 matching dictionary)

8. happy as a sandboy: Medical dictionary

Miscellaneous (1 matching dictionary)

9. happy as a sandboy: Idioms

Definitions from Wiktionary (happy as a sandboy) ▸ adjective:  (simile, dated) Very happy. Similar: happy as a clam, happy as a jaybird, happy as a possum up a gum tree, happy as a lark, happy as a clam at high water, happy as a prince, bright as a button, twinkly-eyed, sunny, beaming, more... Opposite: miserable, sad, unhappy, depressed, despondent Phrases: as happy as a sandboy, more... ▸ Words similar to happy as a sandboy ▸ Usage examples for happy as a sandboy ▸ Idioms related to happy as a sandboy ▸ Wikipedia articles (New!) ▸ Popular nouns described by happy as a sandboy ▸ Words that often appear near happy as a sandboy ▸ Rhymes of happy as a sandboy ▸ Invented words related to happy as a sandboy