百日の説法屁一つひゃくにちのせっぽうへひとつ Expression English jmdict 1 expressions (phrases idiomatic expression proverb single mistake which ruins all one's hard work;one blunder rendering a long period of effort useless;one fart in a hundred days of sermons
説法せっぽう Noun Irregular Transitive Intransitive English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru transitive verb intransitive verb Buddhism lecture;sermon;preaching 2 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru transitive verb intransitive verb scolding;preaching;moralizing;moralising