[Lazamataz]

The Doucheramjet, then, would be one step greater than the Doucherocket.

What about the DoucheIonpropulsionsystem?

[Praetorian]

The Doucheramjet, then, would be one step greater than the Doucherocket.

What about the DoucheIonpropulsionsystem?

Your mileage may vary, but I would say probably not. Your other terms don't quite roll off the tongue so well, along with overcomplicating the simple three level douche -bag, -nozzle, -rocket system. Frankly, I'm not sure that I want to contemplate something worse than a doucherocket. That being said, your other terms are a good attempt.