make a killing
Meaning: If you make a killing, you make a lot of money from a sale or a deal of some sort.
- My aunt made a killing when she bought some shares in a company as soon as they were issued, and sold them a few weeks later for three times what she paid.
- Lots of people made a killing when property values went so high back in the nineties.
After Julie made a killing on the stock exchange, she