I hear people both in person and on television using the alleged word "I's." Is there such a word. For example, people might say, "John, Joe's, and I's baseball ticket got lost in the subway." To me, that is just wrong and there is not such word as I's. Am I right?

Thanks so much for your response. However, I was very serious about double words. I find the use of them to be lazy and an avoidance to one's vocabulary-building. The people that I hear using double words are not saying them jokingly or for humor. In other words, instead of asking "Were you elated?", they say, "Were you happy, or were you happy-happy?" I dislike such lazy speech and hope that it does not become acceptable. Besides, it is often quite confusing, such as, "Was he at the gym, or at the gym-gym?" Someone said that to me and I don't know what he or she meant, nor did I feel that I should have to check for clarification. Thanks for your input.