Grammar fix
make a killing
make huge profit
To make an exceptionally large profit from a particular opportunity or sale.
How oftenNow and then
LevelC1
Used inSpeech & writing
Hear it in context
Notice where the phrase sounds natural.
She made a killing on the sale of her old flat.
A friend of mine made a killing by selling handmade clothes online, but it took her years to build up the business.
Fix the pattern
One small grammar move makes it sound right.
Not: He made a kill on the flat sale.
Say: He made a killing on the flat sale.
The fixed phrase is always 'make a killing', never 'make a kill'.
Don't confuse it
Other ways to say it
Earn huge amounts of money
How muchA lotA fortune
clean upInformal: earn very well from a sale, event, or opportunity.
make a killingYou're here · Informal: make an exceptionally large profit from a particular opportunity.
make a fortuneEmphasises earning an enormous amount of money.