the nitty-gritty

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