spontaneously, extemporaneously, extempore, impromptu, ad lib, without checking, without consideration, without rehearsal, ad libitum, without preparation, just like that, off the cuff, on the spur of the moment, at the drop of a hat, off the top of your head, without previous consideration, without previous thought, ad-lib, unrehearsed, freely, a piacere, on the fly, improvisationally, impulsively, improvised, off-the-cuff, unpremeditatedly, off the hip, by ear, on the spot, without planning, on impulse, instinctively, without thinking, in the heat of the moment, on a whim, unexpectedly, suddenly, without premeditation, all of a sudden, unconsciously, unthinkingly, quite unprompted, without explanation, without prompting … more

indifferently, thoughtlessly, carelessly, heedlessly, nonchalantly, unconcernedly, unemotionally, coolly, informally, casually, lackadaisically, negligently, irresponsibly, incautiously, haphazardly, sloppily, hastily, rashly, neglectfully, inattentively, unmindfully, slapdash, without concern, without care, recklessly, imprudently, foolhardily, injudiciously, unthinkingly, impulsively, ill-advisedly, impetuously, unwisely, indiscreetly, precipitately, foolishly, overhastily, mindlessly, unheedingly, improvidently, brashly, wildly, inconsiderately, temerariously, unguardedly, senselessly, unwarily, misguidedly, sillily, ill-judgedly … more