parvenu
🇺🇸
/ˈpɑːrvənuː/
🇬🇧
/ˈpɑːvənjuː/
a person who has recently become successful or important, often seen as lacking in social graces
The new parvenu in town was quick to flaunt his wealth at every opportunity.
町の新しいパーヴニュは、あらゆる機会に自分の富を見せびらかすのが早かった。