Shirabe
月 と スッポン
English jmdict
1
noun (common) (futsuumeishi) word usually written using kana alone Chinese soft-shelled turtle (Pelodiscus sinensis);soft-shelled turtle (Trionychidae)
月とすっぽんだ。
They are as different as day and night.
2
noun (common) (futsuumeishi) only applies to すっぽん trap door located on the walkway in a kabuki theatre
3
noun (common) (futsuumeishi) only applies to すっぽん bilge pump (used on traditional Japanese ships)
English jmdict
1
expressions (phrasesnoun (common) (futsuumeishi) idiomatic expression two things that are superficially similar but completely different;night and day;chalk and cheese;the Moon and a turtle
Other forms 月とすっぽん 【つきとすっぽん】 · 月と鼈 【つきとすっぽん】 (rarely used kanji form)