How do y’all inflict fear on spoiled brats?

Ok, I’ve babysat before, but this one? This is a different kind of human being—one with a lot less conscience. I need to know how to discipline them. And when I say 'inflict fear,' I don’t mean anything life-threatening or traumatizing—just enough so they know I’m not to be messed with.

As much as I’d love to punch and kick their asses (hypothetically, ofc), I can’t. One slap from them, and I’d be flying straight to Antarctica because, let’s be real, they’re built like a tank.

I have no idea how I ended up in this situation, nor do I understand why their parents entrusted me with someone who doesn’t even need babysitting. This teenager (14? 15? I don’t even wanna remember) looks like they could eat a whole house. I was only told to discipline them and watch over whatever they’re doinggg


Sighing while writing this forum cuz my peers are goin on a date rn meanwhile i’m stuck with this inhumane food vacuum. bUt yk… moneyyyyy

So yeah, help me out. Any advice? Any horror stories? I need to know I’m not alone in this.