aperrado

aperrado/a - adj. to describe a tough or fearless person, especially in front of a particularly difficult situation; someone who does things anyway, against all odds.

Esteban: Mira quien llegó, el Ángel.
la José: Weón aperrado. Lleva toda la semana carreteando.

Esteban: Look who's arrived, Angel.
la José: What a tough guy. He's been partying all week.

Chilenismo