Noun
(idiomatic) The part of a tool or weapon that is physically used for its operation, rather than the part which is held.
The business end of a hammer is known as the "head".
(idiomatic, by extension) The part of anything that is most important and that produces the significant result.
Source: en.wiktionary.orgIf ever there was a theme song for the business end of the industry, it's: "We can't do that; we didn't do that yesterday." Frank Miller
I've been spared to a large extent the business end of the race stick. Wentworth Miller
I have a dad-ager. My dad is really good at the business end of things. But it's really a family affair. My mother handles all my social media stuff - Facebook, Twitter, e-mails, that kind of thing. Jencarlos Canela
There was no real controversy with All In The Family. That came from the people on the business end. Norman Lear
We're not going to spread democracy at the business end of a M16 held by a 23 year old Marine. Paul Hackett
I wouldn't be who I am without my husband, who handled the business end of Donna Karan so I could be creative. Donna Karan