Sadly, no one behind «Unfinished Business» decided that audiences would get even a cursory explanation about the business part: Three salesmen form their own company and spend most of the film trying to close a deal that has something to do with swarf,
a metal residue left over in the creation of large steel objects.
The
residue, also known as red mud, is what's
left over after extracting the alumina from the bauxite and can include small amounts of toxic
metals like arsenic and lead.