It means "O my God"

This phrase can mean everything at once becouse it usually expresses emotions

意思等于中文的“我的天！”

The phrase "God" is hardly a parasite of many russian. This is the same "Oh, my God!". In the meaning of it may be different, as an exclamation, as surprising as a disappointment, as frustration, as a nuisance and a joy. Linguists explain this phrase as a call to the Lord.

where you are met ?