From time to time I read various Flyertalker's referring to "SkyPesos".

Initially, I believed "skypesos" to be a euphemism for redeemable SkyMiles.

But then, I read of other's referring to SkyMiles and SkyPesos in the same post, and was not able to determine from the context if the terms were intended to be interchangeable or not.

And then, I read about "Delta Dollars", and then wondered if "SkyPesos" was interchangeable with "Delta Dollars", which I formerly believed referred to the value of vouchers that Delta sometimes gives for voluntary denial of boarding.

Yet, since no where on Delta's website can any reference be found to the terms "Delta Dollars" nor "SkyPesos", I finally realized that the definition of these terms is centered in the vernacular of Flyertalk, and I simply do not know what they mean.

So, here are the terms that I need to understand, insofar as they may differ from each other:

SkyPesos ?

Delta Dollars ?

SkyMiles ?


Thanks for any explanations you can provide.