silly money—
1. a ridiculously large sum of money:
- Buying a house in central London will set you back close to a million quid—it’s just silly money.
2. (rare) a ridiculously small sum of money:
- Try the new helios range of binoculars, they are just silly money for what you get.
Note: The expression does not correlate in meaning with the phrase mad money—(coll.)
1. money for use in an emergency (especially carried by a girl out on a date):
- He “interviewed” her first date to determine “his intentions for his granddaughter,” then gave her “mad money.”
2. money saved up for personal use (while on holiday, etc.) and spent unpredictably:
- As long as my mad money lasts, I’m going to have a good time.
smart money—(U.S. coll.)
1. money bet or invested by smb. with expert knowledge:
- In referring to money wagered by persons with good tips or information, the term used is “smart money.”
2. said of smart or knowledgeable people:
- Germany has declared war on Russia, and the smart money says that this is only the beginning.