Or start talking at the same time as someone so the group notices, tell that person to go first, and then subconsciously the group will be waiting for you to say what you were going to say after. And if someone butts in before you talk next, stop them and say “let me just finish my thought first.” If they say no, or talk over you, they’ll look like the asshole, since you already let someone talk first and were “next in line” so to speak