Pesto Houmous

My eyes focussed on those two words as I threw a paper wrapper in the bin, and my brain had a Harry Potter moment. I suddenly pictured them being used as a spell to ward off any loutish or unseemly behaviour.
"Pesto Hounous!" car drivers could shout at jaywalkers, to make them think twice before undertaking a potential suicide mission.
"Pesto Houmous!" we could fling at unruly youths as they mingled in boisterous groups, blocking our path.
"Pesto Houmous"! we could chant, as we pointed our invisible wands at the non-public spirited dog-walker who failed to have a Pooper-Scooper ready to wield as necessary.

Now you try. Say the words out loud and with gusto, then give us a clue as to whom you might be inspired to aim them at! Hehehe! And at worst, should your spell prove effective, your victim would only be covered in a tasty, green-tinted sludge, and no harm would have been done.