offhand

Adjective · Adverb

Synonyms: ad-lib extemporaneous extemporary extempore impromptu offhanded off-the-cuff unrehearsed offhandedly

WordNet 3.0

Adjective (2)

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”Synonyms: ad-lib extemporaneous extemporary extempore impromptu offhanded off-the-cuff unrehearsed
casually thoughtless or inconsiderate“an offhand manner”“she treated most men with offhand contempt”Synonyms: offhanded

Adverb (2)

without previous thought or preparation“couldn't give the figures offhand”“we decided offhand to go to Canada”“she had made these remarks offhandedly”Synonyms: offhanded 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”Synonyms: offhanded offhandedly

Webster's Dictionary (GCIDE)

Offhand \Off"hand`\, a. Instant; unprepared; ready; extemporaneous; unrehearsed; as, an offhand speech; offhand excuses; an offhand comment. -- adv. In an offhand manner; as, he replied offhand. [1913 Webster]