Where does “צע״ג” come from?

צע״ג (Hebrew) comes from Hebrew צָרִיךְ עִיּוּן גָּדוֹל — requires great examination.

Ancestry of “צע״ג”, step by step

Step	Language	Word	Meaning
1	Hebrew	צָרִיךְ עִיּוּן גָּדוֹל	requires great examination

צע״ג — Etymology, Origin & Word History | Etymology Explorer