一昨日おととい Common Noun Adverb English jmdict 1 noun (common) (futsuumeishi) adverb (fukushi) day before yesterday 「ウィキペディアを引用するな」という主張が昨日だか一昨日だかの朝日新聞に載っていた。 The exhortation "Don't quote Wikipedia" was included in the Asahi newspaper of yesterday or the day before.