When you ask dumb questions, people get often irritated and dismissive. But if you explain that you are asking simply because you do not genuinely know, they are usually happy to help. They can also go great lengths to make it click for you.
There are benefits in taking a dumb approach to things, new things in particular. Understanding why something is done in a certain way can unlock new meaning, and eventually you will become better at expressing yourself.
Next time you are in a meeting, and somebody nonchalantly asks “you know that, right?”, or says “you have certainly heard about this”, or mentions a term you are not familiar with. Instead of nodding and pretending, stop and ask the dumb question: “can you explain that, please?”.
You will not loose status. You will gain the possibility to learn.