black up

Verb

 * 1)  To become or make (something) black or darker.
 * 2)  To put on or wear blackface makeup.
 * 3)  To make something (e.g. a film, cast, story line, etc.) more racially black in character; blackenize.
 * 1)  To make something (e.g. a film, cast, story line, etc.) more racially black in character; blackenize.