The Raptors and Bucks weren't just going after one-another on the court, there was also a social media war going on between the two teams. After winning Game 3, the Bucks were high-and-mighty and decided to make fun of the Raptors on Snapchat.
There were plenty of jokes made, but the one relevant to this story is below:
Not only did the Bucks lose that game, but their fans chanted "Bucks in six" afterwards, declaring that their team would end up winning the series. As we now know, that didn't happen. In fact, it was the Raptors who won in six, and the team made that very clear on social media.
Right after Toronto's win, the social media team tagged the Bucks' mascot in a video they made mocking him for 1) The Snapchat joke and 2) The Bucks in six chant.