Caesarproof
Something (or someone) that cannot be stabbed no matter what.
Me: "this eyeball was annoying yesterday, but when I tried to stab it in the back, I couldn't."
Other eyeball: "why are you being like this, Jeremy, don't you know that we're Caesarproof?"
Other eyeball: "why are you being like this, Jeremy, don't you know that we're Caesarproof?"