when you're trying to tell someone something and they just keep copying what you say like they came up with it themselves
You spend five minutes explaining your startup idea to your coworker. He nods thoughtfully, then immediately turns to the boss and says, "So I've been thinking—we should build an app that does exactly what I just said." You watch him describe your idea back to you like he's teaching a masterclass. The only difference is he says "synergy" twice, and somehow now it sounds revolutionary.