Where does the phrase dagnabbit come from?

Answer 1

The phrase "dagnabbit" is a minced oath, a term used to replace a swear word. It is believed to be a euphemistic alteration of "goddammit," with the "dag" possibly coming from the term "daggers," which were once used as a vulgar expression. The exact origin of the term is unclear, but it has been used in American English since the 19th century as a mild expletive to express frustration or annoyance.

Answer 2

The word dagnabbit originated in the 1890's. It was used often by prospectors and farmers. Dagnabbit means surprise or consternation.