Dictionary / Vocabulary / 怖いもの知らず
こわいものしらず
foolhardy; reckless; fearless
Also written 怖い物知らず
彼女は怖いもの知らずなの。
She is not afraid of anything.
あいつは馬鹿だから、怖いもの知らずだ。
He is too dumb to fear danger.
トムは怖いもの知らずだ。
Tom isn't afraid of anything.