Where does “تجليخ” come from?

تجليخ (Hijazi Arabic) comes from Arabic تَجْلِيخ — grinding.

تجليخ (Hijazi Arabic): masturbation; grinding

Definitions

Step	Language	Word	Meaning
1	Arabic	تَجْلِيخ	grinding

تجليخ — Etymology, Origin & Word History | Etymology Explorer