Novos Homo

  Novos Homo

from webster's 

new man : man newly ennobled : arriviste

Today, the phrase or its direct translation (new man, sometimes arriviste) is occasionally used in modern English to describe a newcomer to a particular elite social, political, or financial sphere who has achieved rapid success independent of their family background or pedigree.

from Oxford University Press

Novus homo (“new man”), term used in the late republic (and probably earlier) in various related senses: for the first man of a family to reach the senate, where he normally remained a “small senator” (BAfr. 57); in a special sense, for such a man actually to rise to the consulship; and (although in our sources less frequently) for the first man of a senatorial family to reach the consulship (e.g. Cic. Off. 1.138). The first of these achievements was not very difficult, provided a man had at least equestrian standing (see equites), some military or oratorical ability, and good connections. The last was also far from rare: it was in this way that the nobilitas was constantly reinvigorated. But few men rose from outside the senate to a consulship, and the most frequent use of the term in fact characterizes this unusual achievement. It took unusual merit and effort and either noble patronage (e.g. that of the Flacci for M. Porcius Cato (1)) or a public emergency, as in the cases of C. Marius (1) and Cicero.