寄ご居う虫なMeanings1nounhermit crabobsolete termObsolete term for hermit crab. Replaced by ヤドカリ in modern Japanese.See also: ヤドカリ古こ文ぶん書しょには「寄居ご虫うな」と記しるされているが、今いまはヤドカリと呼よぶ。In old documents it is written as 寄居虫, but now it is called ヤドカリ.