Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
all-fired is an adjective and adverb meaning "extreme". It carries 2 recorded senses.
extremely
“you are bloody right”
“Why are you so all-fired aggressive?”
intensifier
Definitions, synonyms and semantic relations for all-fired come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.