An evil maid is a term used to describe a type of attack on your computer or other device. In this kind of attack, someone may come into your room, or the area where your computer is kept, without you knowing. They might then be able to access and manipulate the information or data stored on your device, including reading your emails, getting your passwords, or even deleting files. It's important to ensure that your device is locked and protected whenever you're not using it. That way, an evil maid won't be able to get access to it.