nitty-gritty /ˌnɪtiˈɡɹɪti/adjective 1noun 1forms 2 adjective1 •(informal) Dealing with something in great depth.We deal with them at a very, very nitty gritty level, and we deal with the results of years and years of problems that they've had in the past. — 1976 noun[before a noun]1 •(informal) The core or essence of something; the gist.He gave a short summary without getting into the nitty-gritty of the problem. formsmore nitty-gritty · most nitty-gritty