When you engage in a conversation with a friend or colleague with whom you share so many cultural references that you can use shortcuts rather than explain stuff. Analogous to computer power users, who use keyboard commands rather than menu commands for complex and esoteric functions. Example: Jill and I had a great powerchat the other day.
POWERCHAT
Meaning of POWERCHAT in English
Slang English vocab. Английский сленговый словарь. 2012