whimsy dictionary.com
- capricious humor or disposition; extravagant, fanciful, or excessively playful expression.
- an odd or fanciful notion.
- anything odd or fanciful; a product of playful or capricious fancy.
Synonyms: humor, whim, caprice
whimsy Cambridge Dictionary
- unusual, funny, and pleasant ideas or qualities:
- a sudden wish or idea, especially one that cannot be reasonably explained
- something that is intended to be strange and humorous but in fact has little real meaning or value
whimsy OED