Check with an idiom dictionary.
It's not an idiom; it means that someone is the favorite of another person. A favorite means that they are the best-liked of the group.
It means that is is just the best of the best! :D
maybe.......
It means that is is just the best of the best! :D
That IS the best translation - it means happy forever.
Yes, it is. It means mildly ill or not at one's best; gloomy.
It's not an idiom. It means exactly what it looks like.
It just means your best - the image is of you making sure that your best is totally level and perfect in appearance.
It means you did your best and were honorable; you didn't cheat or anything.
That is not an idiom. It means exactly what it says, although it is probably an exaggeration because it's hard to judge all the fishermen who ever lived and say that one was the best.
The idiom "apple shiner" means the teacher's pet.