Someone who,no matter how good they are at Resident Evil 4 or Super Paper Mario, looks like a complete idiot to other people watching them play.A Wiidiot is someone who spends about £60 a week on games and 10 hours a day prancing around infront of the TV shooting or blowing things up and looking like a retard.
Son:Mum, where's Dad? I haven't seen him for hours.
Mother: Oh, he's upstairs on your Wii again looking like a total Wiidiot.
Son: Oh. He's a knob, isn't he?