After having worked with IT clients from four different continents, I know where this word must have come up…
In this continent, client will never be satisfied and will always ask to keep up adding the functionalities before he accepts the final part-product.
They will never be ready to accept the work-product and postpone the changes/requests in next release. They will never extend the contract to maintain what you have delivered. So once you have delivered the final product, you should seize the expectation to reap from your hard-work. And by that time, you are exhausted as well.