Sentence:  The most rapid and most seductive transition in all human nature is that which attends the palliation of a ravenous appetite....Can those harmless but refined fellow-diners be the selfish <WSD>cads</WSD> whose gluttony and personal appearance so raised your contemptuous wrath on your arrival? 
Meaning of the word marked with <WSD> tags:  A low-bred, presuming person; a mean, vulgar fellow.