vag chat Share definition Flag (n)a chat between two girls, normally involving the love lives. No one without a vag is allowed. Hey Krap, let's have a vag chat..sorry Joe you don't have a vag. vag chat by Choo&Krap January 14, 2009 0 0 Get merch Get the vag chat mug. Buy Now — $32.95 See more merch