粉筆字 (fan2 bat1 zi6) — literally: chalk character; refers to something that one should forget about and leave behind in the past [colloquial] in Cantonese
fanˊ²粉batˉ¹筆ziˍ₆字简 粉笔字
Mandarin Pinyin: fen3bi3 zi4
Meaning of 粉筆字
nounliterally: chalk character; refers to something that one should forget about and leave behind in the past [colloquial]