What does Wei Zi's mouth mean?

Wei Zi's mouth is a network language, and the word Wei Zi is pronounced quickly, which is similar to the word mouth. Therefore, Wei Zi's mouth also means mouth, which is often used to make fun of speaking fast. Wei Zi is a character in the TV series Princess Pearl. The conversation between Wei Zi and Er Kang has been spoofed by many netizens, forming many online buzzwords.