Beggars’ velvet. The lightest particle of down shaken from a feather bed and left by a sluttish housemaid. I selected this particular phrase so that I could use the word sluttish. Though, in this sense, the interpretation of sluttish is actually ‘a slovenly woman’. Which makes the definition of the phrase ‘beggars’ velvet’ easier to understand. Though, I suppose it could work just as well the other way round.