the nitty-gritty
US /ðə ˈnɪt.i ˈɡrɪt.i/
UK /ðə ˈnɪt.i ˈɡrɪt.i/

1.
inti, seluk-beluk, hal-hal penting
the most important aspects or practical details of a subject or situation
:
•
Let's get down to the nitty-gritty of the project.
Mari kita bahas inti proyek ini.
•
He explained the nitty-gritty of how the machine works.
Dia menjelaskan seluk-beluk cara kerja mesin itu.