Where on God’s green earth?

Where on (God’s green) earth?

interrog. (Exactly) where? (An intensive form of where. See examples for variations.) Where on God’s green earth did you get that ridiculous hat?
See also: green, on
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions
See also:
  • God's green earth
  • green
  • green indigo
  • be green about the gills
  • green about the gills
  • green as grass
  • (as) green as grass
  • be green around the gills
  • green state
  • rub of the green