(as) sound as a dollar
Stable, sturdy, and reliable. A: "I wouldn't stand on that old table if I were you." B: "Nonsense, this thing is solid oak—it's as sound as a dollar!" They're trying to convince me that this investment is as sound as a dollar that
*sound as a dollar
1. Cliché very secure and dependable. (*Also: as ~.) This investment is as sound as a dollar. I wouldn't put my money in a bank that isn't sound as a dollar.
2. Cliché sturdy and well-constructed. (*Also: as ~.) This house is as sound as a dollar. The garage is still sound as a dollar. Why tear it down?
sound as a dollar
Very safe. There was a time when the American dollar was the cornerstone of the world's economy, a dependable currency to be admired and aspired to by other nations. That was then, but global economic circumstances have changed. 'Nuff said.