Green’s Dictionary of Slang

a euph. for damn adv.

1845		J. Lindridge Sixteen-String Jack 46: This is a dangy fine horse.
1929		W.D. Edmonds Rome Haul 321: I could dang near say a prayer, dearie.
1943		W. Guthrie Bound for Glory (1969) 75: Well, now there you go again with your dang fool infernal questions.
1946		B. Cerf Anything For a Laugh 46: Dang busted if I ain’t larned to write.
1953		R. Bissell A Gross of Pyjamas (1954) 9: He ain’t so dang niggerly as what they say.
1980		Jackson & Christian Death Row 48: But my money ran out pretty quick, pretty dang quick.
2012		R.A. Dickey Wherever I Wind Up 160: I need to learn what I can from this disaster and make dang sure I am better next time.