Possumo  

Greetings! I am Gnark, a Gnarling from planet Gnaa. I've come to either trade with you Earthlings or destroy your planet!

Cool! Did you know that you're butt-ugly?

Outrageous! I have never been insulted this grossly! Prepare to die with your world!

Well, I think my appointment with a dentist for tomorrow can be seen as canceled now.