Slack

Etymology

 * As an English and surname, from the adjective.
 * Also as an English surname, from the noun.
 * Possibly also a surname Americanized from, from.

Statistics

 * According to the 2010 United States Census, Slack is the 2692nd most common surname in the United States, belonging to 13377 individuals. Slack is most common among White (82.95%) and Black/African American (11.62%) individuals.