The most favorite thing in Engpsh is usually referred to as the "favorite". The word "favorite" comes from the Old French word "favorit", which means "darpng" or "beloved".

For example, you can say:

This is my favorite food. (这是我最喜欢的食物。)
She is my favorite singer. (她是我最喜爱的歌手。)
This is my favorite book. (这是我最喜欢的书。)

You can also use the superlative form "most favorite" to emphasize that something is the favorite among a group of things. For example:

This is the most favorite restaurant among my friends. (这是我朋友们最喜欢的餐馆。)
He is the most favorite player on the team. (他是球队最受欢迎的球员。)
This is the most favorite movie of all time. (这是史上最受欢迎的电影。)