A white person who is perpetually offended, and who demands politically correct language and behavior to prevent anyone from being offended.
A liberal twit.
White liberals are either women or effeminate men.
Arnold the white liberal never says "garbage dump," because that might offend somebody. So Arnold only says "Landfill." Arnold says "Wetlands" instead of "Swamp," and he says "Guy of Color" instead of "Colored Guy." "We mustn't offend anybody, you know" whimpers Arnold.