The dictionary definition we all secretly wish was printed in Webster's. After 15 years in the trenches, I can confirm this is exactly what happens in every client meeting:
Client: "We need a simple website."
Me: *builds website*
Client: "Why can't it also predict stock market trends and make coffee?"
The "wizard/magician" reference is spot on. I've literally been asked if I can "just hack" into systems before. No Karen, that's called a felony, not a feature request.