When you give someone "the business" you make them feel like a complete fool. You don't just give them a talking to, you leave them feeling like a fucktard
1. "And Adam gave the business to Eve his wife; and she conceived, and bare Cain."
2. Fight Club is the business!
3. a. My boss just sent me a nasty. I think he's gonna give me the business in person next.
3. b. Dude, that chick keeps coming in late. I think I am going to have to give her the business about it.