in God's name

Từ điển Oxford Advanced Learner 8th

in ˈGod's/ˈHeaven's name | in the name of ˈGod/ˈHeaven idiom
used especially in questions to show that you are angry, surprised or shocked
•What in God's name was that noise?
•Where in the name of Heaven have you been?
Main entry: ↑name_idiom