Dag gum it!
American SlangDefinition
A mild, folksy exclamation of frustration or annoyance—a euphemistic minced oath for “goddammit,” common in Southern/rural American English.
Examples
"Dag gum it! I left my keys on the kitchen counter again."
"The tractor won’t start—Dag gum it, we just fixed the carburetor last week."
"Dag gum it, Jimmy, you tracked mud all over the clean floor."