Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
offhanded is an adjective and adverb meaning "with little or no preparation or forethought". It carries 4 recorded senses.
with little or no preparation or forethought
“his ad-lib comments showed poor judgment”
“an extemporaneous piano recital”
“an extemporary lecture”
“an extempore skit”
“an impromptu speech”
“offhand excuses”
“trying to sound offhanded and reassuring”
“an off-the-cuff toast”
“a few unrehearsed comments”
without previous thought or preparation
“couldn't give the figures offhand”
“we decided offhand to go to Canada”
“she had made these remarks offhandedly”
in a casually inconsiderate manner
“replied offhand, his mind a million miles away”
“she threw him over offhandedly without even a Dear-John letter”
Definitions, synonyms and semantic relations for offhanded come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.