A tourroid is a tourist who acts as if he/she is from another world. Tourroids tend to assume superiority when dealing with locals, much like a being from another world might when dealing with our primitive race.
Hotel worker: Man, I'm tired of working with all these tourroids, they always act like they own my town.
Man: Oh dude, I don't want to go to the beach today -its filled to the brim with tourroids!
That tourist is so pompous, they act like a tourroid from another planet.