好漢不提當年勇 [－汉－－当－－]

Jyutping hou2 hon3 bat1 tai4 dong1 nin4 jung5
Pinyin hǎo hàn bù tí dāng nián yǒng

Definitions (CC-CEDICT)
  1. a real man doesn't boast about his past achievements (idiom)
Definitions (Wiktionary)
  1. proverb
    a true hero does not boast about their past glories