1. It can apparently mean 'bloody', 'fucking', 'damned', crappy', 'shithouse', etc.
2. It can also be used as a subsitiute for 'damn!'
1. 'Where'd you go and put that dad burn wrench, Clovis?'
2. 'Well, dad burn it if little Mayella ain't a all-growed-up woman now. How old is she? 'leven?'