bon mot (noun)
a clever or witty remark
No truer American existed than Thoreau. His preference of his country and condition was genuine, and his aversation from English and European manners and tastes almost reached contempt. He listened impatiently to news or bon mots gleaned from London circles; and though he tried to be civil, these anecdotes fatigued him. The men were all imitating each other, and on a small mould. Why can they not live as far apart as possible, and each be a man by himself? What he sought was the most energetic nature; and he wished to go to Oregon, not to London.
Ralph Waldo Emerson August 1862