Lopadotemakhoselakhogaleokranioleipsanodrimhypotrimmatosilphiokarabomelitokatakekhymenokikhlepikossyphophattoperisteralektryonoptokephalliokigklopeleiolagōiosiraiobaphētraganopterýgōn
According to wikipedia, it is a fictional dish mentioned in Aristophanes' comedy Assemblywomen. Also I wanted to add the first definition to this
Guy 1: I ate Lopadotemakhoselakhogaleokranioleipsanodrimhypotrimmatosilphiokarabomelitokatakekhymenokikhlepikossyphophattoperisteralektryonoptokephalliokigklopeleiolagōiosiraiobaphētraganopterýgōn yesterday
Guy 2: WHAT THE FUCK!?
Guy 1: It's tasty
Guy 2: WHAT THE FUCK!?
Guy 1: It's tasty