With little or no preparation or forethought. Synonyms:ad-lib, extemporaneous, extemporary, extempore, impromptu, off-the-cuff, offhand, unrehearsed."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"
2.
Casually thoughtless or inconsiderate. Synonym:offhand."She treated most men with offhand contempt"
