adjective, superlative all-fired·est.
- tremendous; extreme; excessive: He had the all-fired gall to quit in the middle of the job.
- Also all-fired·ly [awl-fahyuh rd-lee, -fahy-rid-] /ˈɔlˌfaɪərd li, -ˌfaɪ rɪd-/. extremely; excessively: Don’t be so all-fired sure of yourself.
- (prenominal) excessive; extreme
- (intensifier)don’t be so all-fired sure of yourself!
1837, U.S. slang euphemism for hell-fired.