Definition
To accept an offer as it is or reject it entirely, without negotiation.
要要，不要拉倒；不要就算了
This is my last offer for the car, take it or leave it.
这是我对这辆车的最后报价，要就接受，不要就算了。
The company's salary offer is as it is, you have to take it or leave it.
公司提供的薪资就是这样，你要么接受，要么放弃。
I'm not changing my plans any further, take it or leave it.
我不会再改变我的计划了，要么接受，要么放弃。