Top definition
A conversation where one person's side of the discussion is flawed and, therefore, leaves their ass uncovered, just as thong underwear leaves a human ass uncovered.
Matt: "Overall, I would say that Sarah Palin is a very intelligent woman."
Scott: "I call Thong Dialogue on you; that woman does not have an I.Q. above 90."
Matt: "Yeah, I guess I did leave my ass uncovered on that one. My argument was wearing a thongLet's go pick up chicks."
by EstrogenRock January 29, 2015
Happy St. Patties Day!