jack in(v.+adv.)
打算离开,放弃leave sth readily; abandon
▲jack sth ⇔ in
She is going to jack this job in.她将辞掉这份工作。

jack up(v.+adv.)
1.〈俚〉用千斤顶顶起raise sth using a jack
▲jack sth ⇔ up
You need to jack up the car before you try to remove the wheel.你得先把汽车顶起来,然后设法拆轮子。
2.〈口〉提高,增加increase (salary, payment); raise
▲jack sth ⇔ up
It's time you jacked up my salary.你该给我增加工资了。
3.〈口〉把凌乱的东西安排〔料理〕好arrange or organize sth that is in disorder
▲jack up
Don't worry, he'll jack the whole thing up for us.别担心,他会替我们把一切料理好的。

用作及物动词
▲S+～+n./pron.
He jacked the car and changed the back tire.他用千斤顶顶起汽车，然后更换后胎。

［词源］＜中古英语Jacke(千斤顶)

a jack of all trades
博而不精的人person who can do many different kinds of work but not necessarily well
Our gardener is a jack of all trades, he can do carpentering, decorating, a bit of plumbing, and so on.我们的园丁是一个多面手,他会一点木工活、装潢、修理水管,等等。

He lifted the car with a jack to change the flat tire.他用千斤顶把汽车顶起来,换下瘪轮胎。