a)LIFTto lift something heavy off the ground using a jack 〔用千斤顶〕顶[托]起〔重物〕
Jack the car up higher – I can’t get the tire off.
把车再顶高些,轮胎卸不下来。
b)informalINCREASE IN NUMBER OR AMOUNT to increase prices, sales etc by a large amount 大幅度提高〔价格、销量等〕
They’re just interested in jacking up their profit margins.
他们只对大幅增加利润感兴趣。
Examples from the Corpus
jack up• I already put in a quarter, and now they want to jack it up.• Money for plaintiffs' lawyers and court costs will jack the total up to some $ 550m.