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The epitome of coolness, and feeling good.

To be spiffy cool, one must first be spiffy, as well as rad, which ultimately results in spiffy coolness.
Spiffy coolness is not stupidity, and is the extreem opposite of depression.

The feeling that one could take on the world, but wont, because they know the world is bigger, and would probably win...

Or: The feeling you get when you eat a Cheesy Gordita Crunch, from Taco bell...
Mirranda: Hey, how are youy today?
Cesar: Im Spiffy Cool Man!
Mirranda: Thats Rad!
by Delta12 October 26, 2006
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