Deep is a popular online word, which comes from the slogan "Go all the way" created by the video author. According to his own explanation, this slogan represents happiness and happiness.

Later, some netizens put this passage with music, which was amazing and brainwashing, so this stalk became more and more popular. Tik Tok is a social short video App, a music short video community focusing on young people.

The deep meaning is as follows:

1, describing the appearance of sincere respect.

Quote: Liu's "Class Teacher": "The edges of the book are almost all light gray handprints, and there are many creases, key lines and some symbols that express deep thought."

2. Dense.

Quote: How Deep is the Courtyard by Ouyang Xiu in the Northern Song Dynasty: "How deep is the Courtyard? The willow piles up smoke, and the curtain is not complicated. "

How deep is the courtyard? Rows of willows piled up in Lv Yun, with numerous heavy curtains.