Nitty-gritty

Nitty-gritty is an American word, though its exact origin is up for debate. We will look at the definition of the term nitty-gritty, some theories of its origin and some examples of its use in sentences.Nitty-gritty means the essential core of a matter, the most vital details of a situation, the most practical part of […]
from Grammarist
http://grammarist.com/usage/nitty-gritty/