To buy out: to purchase an entire business or someone,s share of a business 買下…全部股票(或產權、商品等)
He has enough money to buy out the company.
他的錢財多得足夠買下那家公司(或收買那家公司的全部股份).

Dragon lady: a nasty woman who misuses her power 冷酷無情、愛尋釁滋事的有權勢的女人

to get it: to understand 理解

no laughing matter: nothing to joke about; something serious需要嚴肅對待的事；不是開玩笑的事；正經事

nothing to do with someone or sth: not have any relationship with someone; to not get involved with sth 與…無關

rolling in dough: very rich 很富有

strike it rich: to attain sudden financial success 發橫財,大發其財

that's the way the cookie crumbles: that's the way things go sometimes and there's nothing you can do abnout it 事情就是這樣