a person who has suddenly risen to a higher economic status but has not gained social acceptance of others in that class
a gymnastic exercise performed starting from a position with the legs over the upper body and moving to an erect position by arching the back and swinging the legs out and down while forcing the chest upright
Adjective:
characteristic of someone who has risen economically or socially but lacks the social skills appropriate for this new position
upstart的用法和樣例：
例句
用作名詞 (n.)
He was a new upstart and a gentleman of the first head. 他是個暴發戶，是個新封的貴族。
You can't marry that young upstart! 你可不能嫁給那個年輕的暴發戶！
用作形容詞 (adj.)
Lesson those upstart person with a over-confident mind. 狠狠的修理自以為很款很有勢的爆發戶.
He dreaded their upstart ambition. 他懼怕他們的狂妄野心。
Pacquiao was making Hatton look like an upstart amateur. 帕奎奧弄得哈頓像個傲慢的業餘拳手。
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