サニーサイドMeanings1nounsunny sideLoanword from English; used in contexts like 'sunny side up' (eggs) or metaphorically for the positive aspect of something.卵たまごはサニーサイドでお願ねがいします。I'd like my eggs sunny side up, please.人じん生せいのサニーサイドを見みよう。Let's look on the sunny side of life.