Playing Wii or a Wii game so much that you go into almost a relapse state from being away from it. Usually caused by playing the game on a friends console, or one that you don't have accessible. Symptoms include raving on about the game you were playing and trying to convince people to get it. Or trying to convince your parents or yourself to spend the money and buy it.
After playing Paper Mario for three hours straight at Belle's house, Annika fell into a Wiilapse when she got home. That is, until she invited Belle over again to bring her console.
Anna: Which one is the cousin in Kings of Leon
Ellen: not sure, I think it's the guitarist
Anna: I thought it was the bassist
Ellen: No, I'm pretty sure I'm right....I'll look on Wikipedia.....
{looks on wiki}
Ellen: AHA I was right! You got wikislapped!
When someone is blagging knowledge, or just demonstrating ignorance about a subject, and you prove them wrong with evidence from Wikipedia; not dissimilar to wiki-owned but indeed quicker to say.
Katie: "Yeah they say that dicks are the new tits"
Ash: "According to Wikipedia's article on 'Buttock Cleavage', 'bums are the new tits'."
Katie: "Aw man I got wikislapped!"