JonTron means in slang: Jon Jafari, also known as Jon Jon Troon Jafari, is an internet sensation who is well-known for his many game reviews such as Bubsy and Daikatana. His obsession with Banjo Kazooie is what makes him famous. He is the proud owner of Jacques, his *** robotic bird. He has been working with Egoraptor recently on GameGrumps, a new Youtube channel. (in Slang Dictionary, added by Kassandra Dougherty)