business end

noun

1. the front part or end of a tool, weapon, etc., with which the work is done or from which a missile is ejected, as opposed to the handle or butt.

   the business end of a revolver; the business end of a screwdriver.

business end

noun

1. informal,  the part of a tool or weapon that does the work, as contrasted with the handle

Word History and Origins

Origin of business end¹

First recorded in 1875–80