flower
1. The best example or greatest representative of a group. Margaret was long considered the flower of her graduating class.
2. The best state or prime condition of something. It was in the flower of my youth that I knew I wanted to be a great writer.
3. slang The vagina, especially the labia majora and the labia minora.
4. slang An effeminate, weak, ineffectual, or cowardly man or boy. Don't be such a flower, Jimmy, stand up for yourself and fight him!
5. A term of endearment, often toward a girl or woman. Primarily heard in UK, Ireland. Ah, my little flower! Come here and give your auntie a kiss! Here you are, me auld flower, two tickets to the show, as promised!
flower of the flock
The best person or thing in a group. Your cupcakes are just the flower of the flock—there is no better item at the bake sale. She's the best we've got, the flower of the flock, so you should absolutely put her on this case.
April showers bring May flowers
Poor, often rainy weather in April can prove beneficial to blooming plantlife in May. A: "Ugh, will it ever stop raining?" B: "April showers bring may flowers, at least."