Refers to the physical weight of an object or load, but it is also used to describe an emotional burden or the sense of relief felt when a worry is finally gone.
You have no idea the peso I took off my shoulders now that I finally handed the project to the boss.
The standard term used in Puerto Rico to refer to the US dollar, which is the official currency of the island. It is used in everyday conversation for any financial transaction (Puerto Rico is a US territory and uses the US dollar, but locals colloquially call the dollar a peso).
That mofongo combo cost me twelve pesos at the restaurant on the corner.
The everyday term Puerto Ricans use to refer to the U.S. dollar. It is used to talk about any amount of money in the island's official currency (Puerto Rico uses the U.S. dollar as its legal tender, but the term persists from the era when the Puerto Rican peso was the currency).
Can you lend me five pesos to buy something to eat at the cafeteria?
The national currency of the Dominican Republic, which is not worth shit. It is so devalued that even if you traded one peso for five, it still would not be worth a thing.
A: Dude, what about this peso? B: Throw that shit away, it is not worth anything! A: Oh look, A PESO! B: Throw 20 more on top of it so you are at least bending down for something that is worth it!