verb: to chat bitchily with others generally at the expense of an absent party. A combination of "kibitz" and "to bitch".
We were standing around kibitching about the new receptionist when she walked into the room and we all fell silent wondering if she'd heard what we said about her.
A combination of "Kirby" and "Bitch", a Kirbitch is anyone in a piece of media, who gains additional power by eating others (while remaining weaker than Kirby)