black hat

Meaning

Noun

• A villain or bad guy in a story, especially in a Western (a film or other work of the Western genre).
• A malicious hacker, one who violates computer security out of maliciousness or for personal gain.
• A Haredi Jew; a member of an ultra-Orthodox Jewish community.

Origin

• From the black stetsons (cowboy hats) traditionally worn by such villains.
• From the black hats traditionally worn by men in Haredi communities.