nitty gritty
/ˈnɪti ˈɡrɪti/
noun
- The most important and practical details or facts of a matter.
- After hours of discussion, they finally focused on the nitty-gritty of the budget.
- Let's skip the introductions and get down to the nitty-gritty of the contract.
- The report was full of theory, but I need the nitty-gritty on how to fix the problem.