Okay, so you know how you go to school to learn things like reading, writing, and math? Well, there are also grown-up schools called universities where people can learn a lot more things like science, history, and engineering.
Now, have you ever heard the word 'open source'? It means that something is like a big community project where lots of people work together to create or improve something. For example, anyone can help make a new Minecraft world by creating or sharing blocks, skins, and mods.
So, an open source university meetup is like a big gathering where people who are interested in learning together and sharing ideas come together. Some people who go to these meetups might be students, while others might be experts or professionals in their field. They might talk about different subjects, share their knowledge, and work on projects or ideas together.
The cool thing about a meetup like this is that it's open to anyone. You don't need to be enrolled in a university or have special qualifications to join. All you need is an open mind and a willingness to learn and share. So, if you're interested in meeting new people and learning about new things, then a meetup like this might be a great place to go!