(1) Tighten one’s belt = cut one’s expenditure ; live more frugally.
- She said the poor must tighten their belts.
- I’ve had to tighten my belt since I stopped working full-time.
(2) Make a killing = to earn a lot of money in a short time and with little effort.
- They made a killing with the sale of their London house.
- Tom made a killing at the race track yesterday.
(3) Well-heeled = wealthy.
- His family was very well-heeled.
- My uncle can afford a new car. He’s well-heeled. Everyone in his family is well-off.
- The price tag is out of reach of all but the most well-heeled.