nip and tuck

基本解釋

It was nip and tuck as to which boat would reach port first.
兩條船中哪一條先進港都很難說。
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Conspiracy theorists might conclude that the American government is trying to nip and tuck its way to attractiveness.
隂謀論者可能推斷道：美國政府正企圖隱瞞一些數(shù)據(jù)，讓自己更具有吸引力。
And it’s not just a nip and tuck to appear younger and fresher: Greater numbers of young women are now going under the knife.
想要變得年輕而有活力，竝不是簡單的拉拉捏捏就能完成的，現(xiàn)在，很多的年輕女性是要挨刀子、受些皮肉之苦的。

But the A-levels which used to provide that preparation have changed into a school-leaving qualification, and universities have had to nip and tuck what they teach accordingly.
ECONOMIST: University education
One of the ways the company has been able to do that is through its nip and tuck in acquisition strategy that allowed Apple to obtain core technology that it could use in new products and services.
FORBES: Securing The Future of Apple's iPhones and iPads
There's not much else to attract the nip-and-tuck crowd.
FORBES: Just the ticket

If a competition is nip and tuck, first one side seems to be winning and then the other, so that the result is not certain.
If a situation is nip and tuck, someone or something in that situation comes very close to failing or ending.