What is square up?

"Square Up" can refer to different things depending on the context. Here are a few possibilities:

1. Square (the company): Often colloquially referred to as "Square Up," this is a financial services and mobile payment company co-founded by Jack Dorsey. Square provides a range of products and services including point-of-sale systems, payment processing solutions, and business tools like inventory management and analytics. Their card readers allow businesses to accept credit card payments from a mobile device.

2. Square Up (slang): In informal language, "square up" can mean to confront someone or prepare to fight. It might be used in a social or sports context to describe getting ready to physically or verbally face someone directly.

3. Square Up (finance): In finance or trading, "square up" can mean to close a position or ensure that one's positions on the market are balanced. This could mean selling off assets to cover short positions or buying assets to cover long positions.

4. Square Up (music): This could refer to a musical album or song title. For example, "Square Up" is an EP by the South Korean girl group Blackpink, released in 2018.

5. Square Up (geometry and mathematics): It can mean to create or understand a geometric square on paper or in a digital environment. It can also mean adjusting or aligning something to make it square geometrically.

If you have a specific context in mind, let me know for more detailed information!