offhand Synonyms

off-the-cuff extemporaneous impromptu offhanded offhandedly extempore extemporary unrehearsed unconcerned perfunctory uninterested unready unstudied uncivil unbidden promiscuously respectless rude sharp short slapdash spontaneous straightforth superficial terse spontaneously unceremonious unscripted unreflective unceremoniously unplanned off-hand improv extemporaneously unpremeditated unprepared en passant bare-knuckle bad-mannered unalert ad lib on the fly ad hoc throwaway without preparation abrupt cursorily cursory curt discinct