The middle classes air their moral prejudices over their gross dinner-tables, and whisper about what they call the profligacies of their betters in order to try and pretend that they are in smart society, and on intimate terms with the people they slander.
There are no more uses of "slander" in the book.
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In the United States, it is extremely difficult for someone famous to win a slander lawsuit—almost no matter what is said.
Check your sources or you could be sued for slander.