First, you have to decode DRB that's easy if you think real hard!! It stands for: Dogs Rule Bucks. Second, What is it? DRB is money you can spend on Dogs at the Doggi Shop, and needs for your dogs at the shops in Dog City. That is what DRB(dogs rule bucks) are.

Rileya1a(creator)
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♥♥♥ LOVE DOGS ♥♥♥ (Sorry that it's so big)