Idiom “a group of words established by usage as having a meaning not deducible from those of the individual words (e.g., rain cats and dogs) “there are more than 25 million idiomatic expressions in English language” Wikipedia
Go Bananas and click here for more fruit idioms.
“Life Is Just a Bowl of Cherries” is a song with music by Ray Henderson lyrics by Les Brown, published in 1931.[1]Ethel Merman introduced this song in George White’s Scandals of 1931. Wikipedia
Judy Garland sings it here

“Erma Fiste (known as Erma Bombeck) was born in Bellbrook, Ohio, to a working-class family, and was raised in Dayton. She became very famous when she wrote, ‘If Life Is a Bowl of Cherries What Am I Doing in the Pits?’ The hilarious #1 New York Times bestseller was Erma Bombeck’s take on marriage and family life is “fun from cover to cover”.”