What is "blackhat"

n. (alternative spelling of black hat English)

Blackhat is a 2015 American action thriller mystery film co-written, co-produced and directed by Michael Mann. The film stars Chris Hemsworth, Tang Wei, Viola Davis, Holt McCallany, and Wang Leehom. The film premiered at the TCL Chinese Theatre in Los Angeles on January 8, 2015, and was released in theaters on January 16. Blackhat was a box office bomb, earning only $19.7 million at the box office against a budget of $70 million. While the movie received generally mixed-to-negative reviews, with criticisms focused on casting and a point pace, some critics found brilliance in the film, enough to place the film in some critics' year-end lists.