So, last summer, Roger Federer stars in a series of Wilson commercials that involve him pulling out a tennis ball themed psychologist’s couch, and asking, amoung other things, “How does this make you feel?” And in a behind the scenes video, he once again proves his adorkableness by tripping over the “th” pronunciation:

Excuses to use the words “dis” and “dat” ensue across tennis blogs, particular those of Fed fans, for the rest of the summer.
A year later, when Switzerland’s favourite athlete makes his normal birthday trip to Canada, their favourite athlete and birthday boy, who happens to be admirer of his, is apparently being encouraged to be even more like him:

I expect another summer of “dis” on the hockey blogs. Though at some point dis joke’s going to get old…I think.