business end of something
the business end (of something)
The functional part of an instrument, tool, or other object. These kids are reckless on the ice, so watch that you don't get hit with the business end of a hockey stick. My dad swung at the intruding squirrel with the business end of a broom.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
business end (of something)
n. the dangerous end of something; the part of something that does something as opposed to the part one holds on to. Harry burned himself on the business end of a soldering iron.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.