all-fired adjective 1adverb 1 adjective1 •(US, informal) Extreme, excessive.It's an all-fired outrage to tell any human creature that he's bound to hell. — 1851 adverb1 •(US, informal) Extremely, thoroughly, very.Of course, I was only stringing Jerry . . . he thinks he's so all-fired cute and smart. — 1909