- cost a pretty penny
- cost a pretty penny & cost an arm and a leg & cost the earthFig. to be expensive; to cost a lot of money. •
Mary's dress is real silk. It must have cost a pretty penny.
•Taking care of a fancy car like that can cost a pretty penny, let me tell you.
•It cost an arm and a leg, so I didn't buy it.
•A house that size with an ocean view must cost the earth!
Dictionary of American idioms. 2013.