In the South, someone who comes into money and is showy about it is referred to as “new money”. Those who tend to spend lavishly and make sure others know they have it to spend quite often don’t have it for long...
Also known as nouveau riche or N-word rich.
My daughter has an apartment in the city. It’s not pretty, but she’s young. She says it’s amazing how many really big TV boxes and new couches, etc. keep showing up in the welfare apartments behind her. She said it’s tax season. They get a ton of money from taxes even though they never worked.
“Nouveau riche” is a common pejorative for such people.