arriviste: a person who has recently attained success, wealth, or high status but not general acceptance or respect; an upstart (
Example: He excavates enough dirt that, midway through the book, the reader loses sympathy with Bernays, who comes across as an insufferable egotist and insecure, name-dropping arriviste. [
Reference: Ron Chernow, "First Among Flacks", New York Times, August 16, 1998])
