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.
[1990s+ Teenagers; perhaps related to mack, ''pimp'']
A pimp: copped you a mack
[1887+; fr 15thcentury mackerel, ''pimp,'' fr Old French macquerel, perhaps related to Dutch makelaar, ''trade, traffic,'' hence ultimately to make, macher, etc]