from The American Heritage® Dictionary of the English Language, 4th Edition
- adv. Informal Used as an intensive: Don't be so all-fired aggressive.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Extreme, excessive.
- adv. Extremely, inordinately, very.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. extreme; used as an intensifier
- adv. extremely
Alteration of hell-fired.(American Heritage® Dictionary of the English Language, Fourth Edition)
Probably a euphemistic form of hell-fired. (Wiktionary)