brainwashed

When someone says they've been brainwashed, it means their opinions or thoughts have been completely influenced by someone else's ideas without them realizing it.

The word "brainwashed" usually refers to a situation where someone has been exposed to repeated messages or information that are designed to change their beliefs. This can happen through advertising, propaganda, or even manipulation by others. For example, if you see a lot of commercials for a new product and suddenly start thinking it's the best thing ever, you might be said to have been brainwashed into buying it. It doesn't mean that the person is being forced against their will; rather, they're being subtly influenced in a way that affects how they think or behave.