No, Rush didn't call it TrouserGate, I don't believe. The Freeper who posted the article sneakily put TrouserGate in parentheses after the title of the article, but if you click on the link to Rush's website, TrouserGate is not there anywhere. And I never saw it in the full transcript for Rush's show either.
That is why you and the Freeper who wrote that need to be encouraged... ;) TrouserGate it is!