What is a square slang?

"Square" as slang is a term used to describe someone who is uncool, out of touch, or conventional. It implies that the person is not hip or trendy, and perhaps even a bit boring.

Here are some examples of how "square" is used:

* "My dad is such a square. He thinks all music after the 70s is noise."

* "I tried to tell her about this awesome new band, but she just looked at me like I was speaking a foreign language. She's so square!"

* "Don't be such a square, loosen up and have some fun!"

The term "square" originates from the shape itself, which was associated with rigidity and conformity, the opposite of the free-spirited, rebellious spirit that many associate with being "cool".

It's important to note that while "square" can be used as a negative term, it can also be used affectionately or ironically. Sometimes people use it jokingly to describe themselves or someone they like.