Mao Mao's elder brother Tianjin dialect means "Brother Cat", which is a kind of intimate or pet address, and is usually used to describe more naive and immature young people. This kind of address has a certain derogatory and discriminatory meaning, but it can also be regarded as a way of joking or teasing.

In Tianjin dialect, the word "cat" is usually used to describe babies or children, so "Mao Mao brothers" can be understood as immature people among children or young people.