One that has dedicated time and soul to all that is prog music. A prog-dog can be of any age, sex or race. Once one has reached the nirvana-like state of prog-dogging, a common level of respect among other prog-dogs is achieved.
Jon: James, you truly are a prog-dog
James: Takes one to know one Dr. Prog
Jon: Prog on!
by dr-prog October 6, 2009
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