A chatbot is a program designed to imitate human speeches. It is useful to give rhetoric for when the Bush is on the ranch. Tip: you can also put one to good use to confuse your boss enough to let you sneak out of the office. Chatbots are also used to provide generous insights in chat rooms (when the human is not around). Chatbots can also make fun of or curse at other (normal) people in chatrooms, sometimes even if you didn't want him/her/elmo/oprah winfrey to.