Acronym for "King of the Idiots". This is a guy who is an idiot, but is the smartest of his idiot friends. So he thinks he is a genius and superior. KOTI's are cruel to their "subjects" and belittle them at every opportunity.
See those idiots over there trying to get their truck out of the ditch? The fat, smelly, toothless one, with his hands in his pockets and yelling, is the KOTI.