arriviste

那个暴发户不惜一切代价跻身上流社会，真是典型的野心家。

That ___arriviste would do anything to join high society, showing typical social-climbing ambition.

那个暴发户在晚宴上炫耀他的新表，却不知道如何使用餐具。

The ___arriviste showed off his new watch at the dinner party, but didn't know how to use the proper utensils.