The drama between the two flared up when Donald tweeted on April 24 that he's much smarter than Jon Stewart. He referred to Jon as "Jonathan Leibowitz," prompting some Twitter followers to wonder if Donald is an anti-Semite.
This led Jon to call out Donald on his show, saying that Donald's birth name is "F**kface Von Clownstick." Needless to say, Donald — or should we say, Mr. Von Clownstick — was not amused.
"Amazing how the haters & losers keep tweeting the name 'F**kface Von Clownstick' like they are so original & like no one else is doing it," Donald tweeted.
Shakespeare once wrote, "What's in a name?," but we think even he would agree that Jon's name for Donald is quite a statement.