What does "bounce off [something]" mean? In what circumstances could I use it?

Native speaker’s answer
Rebecca
To "bounce off [something/someone]" means to discuss something and get ideas or opinions from other people. Here, they're saying that the more ideas are shared, the more ideas can be generated and discussed from those ones. You can use this when you want to get someone's opinion or when sharing the process of getting an idea or thought. Ex: Can I bounce a couple of ideas off of you? => can I get your opinion? Ex: We bounced ideas off each other until we were both happy with a single idea.