mack on

noun

1. a pimp.

verb (used without object)

2. to flirt with or make sexual advances toward someone (often followed by on): They spend their nights macking on the ladies.

noun

1. British informal a variant spelling of mac short for mackintosh (def. 1), mackintosh (def. 3)

noun

1. slang a pimp

proprietary name for a brand of heavy automobile trucks, named for brothers John M., Augustus F., and William C. Mack, who established Mack Brothers Company, N.Y., N.Y., in 1902. Their trucks formally known as “Mack Trucks” from 1910.