Clams, dough, bacon, bread, lettuce. If you're talking food, you could also be talking dollars.
On August 8, 1786, Congress adopted the monetary system of dollars, with a value based on a Spanish coin that popularly was called by the Dutch word: daler.
Over the next 232 years, the dollar and its larger denominations gained other names too. In fact, while low denomination bills often have food names, higher denomination bills have the names of things.
These special slang dollar words have been coined, you might say, by gangsters and gamblers. The words often end up in popular culture. For example, Tony Soprano, lead character in the hit series The Sopranos, often referred to a million dollars as a rock, as in: "This whole thing is going to cost me close to a rock." That's not the same as roll, which just means you have a lot of scratch.
Presumably, Tony's rock was filthy lucre, big lolly, loot or plunder. In other words, OPM, other people's money.
Now if you have a frog, you're probably a gambler who just put $50 on a horse. That is if you have a lot of frog skins.
If you have a rack, a yard or a stack, you've got at least a thousand smackers.