That's true but it's also not really worth very much.

It's something you might have called someone with a physical disability on the school yard in the 90s but I have not heard anyone use it in that way in a long long time

I always thought it was named after the character from Sex

Should have at least been GNUIMP. Maybe people would have used it.

Because it's not commonly used that way. If we avoided anything that had at some time been used as a slur, we'd only have about 3 names to pick from. (Of course I exaggerate, but it's better than saying "it would retard growth", isn't it?)