nouveau riche
noun
[ ˌnuːvəʊ ˈriːʃ ]
• people who have recently acquired wealth, typically those perceived as ostentatious or lacking in good taste.
• "the long-term wealthy and the nouveau riche came flocking to Saint Laurent's show"
Similar:
the new rich,
parvenus,
arrivistes,
upstarts,
social climbers,
vulgarians,
nouveau riche
adjective
• relating to or characteristic of the nouveau riche.
• "nouveau-riche social climbers"
Origin:
French, literally ‘new rich’.