Well, the "amusing" part of this is twofold.  First, Wilson denied using the term, then three such uses were found -- two on twitter, one under his byline.  So either he lied, or he can't remember his own writing.  Needless to say, he hasn't responded to questions about this, at least as of now.
Then, I looked at his tweets and followed a couple of links.  Ezra -- The Mouth That Roared -- now has a "Climate Barbie" webpage that looks like it was designed by a seventh grade student.  Then I looked at some tweets and a website by Shelia Gunn Reid, the Alberta Bureau Chief.  They took absurdity to a whole new level, and the webpage looked like a parody of the National Enquirer.  Only it wasn't a parody.