"upstart" in Chinese (Simplified)
暴发户新贵
Definition
最近崛起、获得权势、名声或财富的人或机构，通常对已有地位的人表现出大胆或傲慢。
Usage Notes (Chinese (Simplified))
通常带有贬义，指新崛起者对既有势力的傲慢或无礼。可作名词（upstart）或形容词（upstart 公司）使用。很少用于正面语境。
Examples
The upstart challenged the old champion to a match.
这个**暴发户**挑战了老冠军。
Many upstarts try to enter the technology market every year.
每年都有许多**新贵**试图进入科技市场。
She dislikes the upstart attitude of her new coworker.
她不喜欢新同事的**新贵**态度。
That little café is an upstart trying to beat the city's famous bakeries.
那家小咖啡馆是个**新贵**，想打败城市里著名的面包店。
He acted like a true upstart, ignoring everyone's advice.
他像个真正的**新贵**一样行事，无视大家的建议。
No one took the upstart seriously until she started winning awards.
没有人把这个**新贵**当回事，直到她开始获奖。