noun
towering rage; boiling with rage
A yojijukugo describing extreme anger, literally 'angry hair piercing the sky'. Used in literary or emphatic contexts.
彼は怒髪衝天の勢いで抗議した。
He protested with towering rage.
A more common verbal phrase with the same meaning; 怒髪衝天 is the compact yojijukugo form.
A yojijukugo derived from classical Chinese, combining 怒 (anger), 髪 (hair), 衝 (pierce), and 天 (sky). The image is of hair standing on end from rage, piercing the heavens.