FWIW you can kinda replicate bangs using Firefox using bookmark “keywords” (I think that’s what they’re called). They basically allow you to create a bang for any site using any trigger characters.

I can’t tell if you’re joking or if I misunderstood what you wrote.

It’s remove (rm) recursively (allow removing folders) (-r) and “force” (don’t prompt for confirmation, e.g. when removing write protected files) (-f) everything in the root folder (/*)

With -r and -f getting combined into -rf of course.