offhand Synonyms

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