parvenu
/ˈpɑːrvənuː/
noun
- A person who has recently gained wealth or status but is not accepted by those who have had it longer; an upstart.
- The old-money families looked down on the parvenu who bought the mansion next door.
- The novel tells the story of a parvenu trying to fit into high society.
- He was considered a parvenu by the club's longtime members because of his flashy car and loud manners.