The process of two people talking to one another and continuously going back to answer the other person's questions. This usually occurs during instant messaging sessions when two people ask a question at the same time.
I met this girl on Chat Roulette. She was really cool, but we back-chatted for like 20 minutes.
Said to a younger person by an older person, if the younger person question the older person, who has no explanation or good reasoning for their demands.