Uncle's bread and butter is a common network language, which is usually used to express praise or appreciation for someone or something.

This sentence first came from the Japanese cartoon "Uncle is the object of love", and later it was widely used in online chat, social media, video barrage and other occasions. On some video websites, viewers will also use this sentence to express their love for food when watching food videos.

In addition, this sentence has also been misunderstood by some people as implying homosexual relations, so it needs to be judged according to the occasion and context when using it.