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sunny side up
1. Of an egg, fried in a pan on one side so that the yolk remains runny on the top. When I was a kid, I would only eat eggs cooked sunny side up; now I'm a bit more flexible in how they can be prepared.
2. Having a particularly cheerful and optimistic attitude and outlook. He's a really nice guy, but it's a little irritating how he's always sunny side up like that. Not everything is sunny side up in the country, though, despite its booming economy; many in the more rural areas still face poverty and high unemployment rates
Fig. [of eggs] with yolks facing up and not turned over or cooked through; straight up. I'll have my eggs sunny-side up, with toast and coffee. People who like sunny-side up eggs wouldn't dream of eating a whole raw egg.
ˌsunny-side ˈup(American English) (of an egg) fried on one side only: How’d you like your eggs - scrambled or sunny-side up?
mod. [of eggs] having yolks facing up and still yellow and hot, but not cooked through; straight up. I’ll have my eggs sunny-side up, with toast and coffee.