Definitions for jeezdʒiz
Random House Webster's College Dictionary
(used as a mild expression of surprise, disappointment, astonishment, etc.)
Origin of jeez:
1920–25, Amer.; euphemism for Jesus
Kernerman English Learner's Dictionary
indicates surprise or frustration
Jeez, I didn't realize it was so late.
Exclamation of fright, incredibility, shock, surprise or anger.
Origin: Shortened form of Jesus. A minced oath.