black hat

Etymology 1
From the black stetsons (cowboy hats) traditionally worn by such villains.

Noun

 * 1) A villain in a story, especially in a Western (a film or other work of the Western genre).
 * 2)  A malicious hacker, one who violates computer security out of maliciousness or for personal gain.

Translations

 * Chinese:
 * Mandarin: 黑帽黑客
 * Welsh: het ddu

Etymology 2
From the black hats traditionally worn by men in Haredi communities.

Noun

 * 1) A Haredi Jew; a member of an ultra-Orthodox Jewish community.