What does Beijing dialect mean when I say front door and you say hip axis?

It means: the question and the answer are completely irrelevant, and the answer is irrelevant, which means that you can't communicate.

There are many similar sentences, such as:

1, I said Qianmen Building and you said Train Leader;

2. I said Qianmen Building, and you said Hot Kangtou;

I said the front gate house, and you said the bad old man.

4. I said the front gatehouse, and you said the elbow;

5. I said the main gate house, and you said the wax gun leader.

Extended data:

The "front gatehouse" in Beijing refers to the Zhengyangmen Arrow House at the southern end of Tiananmen Square.

Zhengyangmen was built in the 17th year of Yongle in Ming Dynasty (14 19). It is one of the "Nine Gates of Shi Jing" in old Beijing, which integrates Zhengyangmen Gate Tower, Arrow Tower and Wengcheng, and is a complete ancient defense architecture system.

According to local records, the towers and watchtowers at that time were grand in scale and tall in shape; Wengcheng is a representative work of old Beijing city wall architecture, with only towers and arrow towers left, and it is the only well-preserved city gate in Beijing.