Fierce
Violent, Intense
な adjective
もうれつ
激しい (はげしい) Intense, Violent, Fierce
猛〜 (もう) Fierce, Energetic
猛烈 (もうれつ) Fierce, Violent, Intense
強烈 (きょうれつ) Very Strong, Intense, Shocking, Striking
He thinks Mullets もうれつ look Fierce.