Meaning:
Egg that is cooked on one side, however, means that someone who is cheerful and optimistic
Usage:
- Despite his troubles he always has his sunny side up
- She lost all her jewels during the travel, but has sunny side up
- For breakfast I had eggs sunny side up
Etymology:
Figurative sense of “cheerful” is attested from 1540s. Sunny side about optimistic outlook is from 1831. Eggs served sunny side up first attested 1887, in lunch counter slang, about appearance when served.