JMdict: 2004750

四当五落 【よんとうごらく】

  1. [exp] sleep four hours and pass, sleep five hours and fail (when cramming for university entrance exams)
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Kanji in this word:

Kanji Meanings On Readings Kun Readings Grade
四 Four シ よ, よ.つ, よっ.つ, よん 1
当 Hit, Right, Appropriate, Himself トウ あ.たる, あ.たり, あ.てる, あ.て, まさ.に, まさ.にべし 2
五 Five ゴ いつ, いつ.つ 1
落 Fall, Drop, Come Down, Village, Hamlet ラク お.ちる, お.ち, お.とす 3