business end

noun
UK /ˈbɪznəs ɛnd/
US /ˈbɪznəs ɛnd/

The business end is the part of a tool that does the real work.

Be careful with the business end of that hammer.


OTHER MEANINGS

2. The most important or serious part of a situation or activity.

Now we get to the business end of the project.

3. The front or working part of a weapon, such as the muzzle of a gun.

He kept the business end of the rifle pointed at the ground.

4. The part of an animal that can bite or sting.

Watch out for the business end of that wasp.