In that case you would miss out on one of my favorite old jokes involving an English teacher turned cab driver in Boston being asked where's the best place in town to get "scrod". I'll take your question at face value. A noun got drilled into me as a "person, place, thing, or idea". I'm sure there are exceptions. Adjectives on the other hand are words that describe nouns. I'm 6 foot 1, which sometimes gets me described as tall, though certainly nothing out of the ordinary. If someone lumped me in with others and referred to us as the "talls", well, we haven't been subjected to much prejudice so I would be confused more than insulted, but I would wonder why they didn't just say "tall people". It's like that - somehow using the describing word as a substitute for the people themselves makes a person go "hmmmm". I will say, though, that what's OK and what's not OK terminology for black folks has made multiple shifts in my time on earth. So I run afoul at times. I probably wouldn't have said what Brock said - but when he said it, I felt I understood.