完徹かんてつ Noun Irregular Intransitive English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru intransitive verb colloquial all-nighter;staying up all night abbr. of 完全徹夜 おかげでほぼ完徹だ。 Thanks to which I was up nearly all night.