I think we're just arguing semantics at this point. From an economic definition you, me, and everyone else who has to exchange money for goods and services is a consumer. I'm referring to consumer culture/consumerism, which wikipedia defines in a cleaner way than I can. Buying groceries period makes you a consumer, having a weird sense of superiority because you go to a specific grocery store is consumerism.
> In contemporary consumer society, the purchase and the consumption of products have evolved beyond the mere satisfaction of basic human needs,[1] transforming into an activity that is not only economic but also cultural, social, and even identity-forming.