un demente

crazy person

→ uno
phrase Rare #46,390
crazy person Used to describe someone acting irrationally or wildly; can also be insulting.
SP: No conduzcas así, pareces un demente.
EN: Don’t drive like that, you look crazy.

Pensaban que Colón era un demente, ¿no?

They thought Columbus was crazy, didn't they?

— El hombre de la Tierra (2007)

Es un demente total.

He's a total lunatic.

— The Chaser (2008)

Él actuó como un demente.

He acted like a madman.

Eres un demente.

You're insane.

— El club de la lucha (1999)