Thanks a lot!

"Youniverse" is not a real word. I never heard of it before. It is not in the dictionary. It is a joke, a made-up word, a "neologism." The word "you" in English is pronounced the same as the the name of the letter "u" (and in texting, the word "you" is sometimes abbreviated to "u"). People say of a selfish individual, "he thinks the universe revolves around him," and Google shows me a variety of uses, with different meanings, but all combining the concepts of "universe" and "you."

It is youniverse, not universe that why I am curious. Thank you !

universe? It's a combination of material and spiritual stuff. Almost everything in it keeps changing, but it has rules that never change.