Nabonga
You see someone who is so clueless you want to throw them in a ditch, but you just say 'Nabonga' and laugh like you're telling a joke when you're really being a rude little gremlin.
My neighbor said 'Nabonga' to my dog when it ate his shoes.
My friend said 'Nabonga' to the guy who tried to text me while driving.
At the park, I said 'Nabonga' to the kid who thought the swings were a slide.