It’s not a place, it’s a point.
A point in the project when there is so much to do, that all you can do is grind on the work that has to be done.
It doesn’t matter what the work is, how complex it is, what needs to be done, etc.
All that matters is that you’re at that point and you need to Grind.
The Grinder doesn’t care about design patterns, frameworks, best practices or methodologies; it only cares about getting it done.
Some people excel at Grinding, some don’t – it can be stressful and non-forgiving.
There is only one way out of the Grinder – to code, code, code – until the pile is no more.
Every project hits the Grinder at some point. The key is to make sure you’re not always in it.