Bohemian, abrupt, ad lib, ad libitum, ad-lib, affable, airily, airy, aloof, any old way, any which way, anyhow, at short notice, at sight, blase, brusque, bunglingly, by ear, by the by, by the way, careless, carelessly, casual, casually, cavalier, clumsily, cool, cordial, cursorily, cursory, curt, degage, devil-may-care, disregardant, disregardful, disregardfully, distant, easy, easygoing, en famille, en passant, extemporaneous, extemporaneously, extemporarily, extemporary, extempore, familiar, familiarly, flippant, folksy, forgetful, forgetfully, free and easy, glib, gracious, haphazardly, haymish, heedless, heedlessly, helter-skelter, hit and miss, hit or miss, homely, homey, impromptu, improvisatorial, improvise, improvised, improviso, in passing, inattentively, incidentally, inconsiderate, inconsiderately, indifferent, informal, informally, insouciant, irregular, jury-rigged, lackadaisical, lazy, light-hearted, loose, makeshift, messily, natural, naturally, nonchalant, oblivious, off the cuff, off the hip, off-the-cuff, offhanded, offhandedly, on sight, once over lightly, out of hand, parenthetically, perfunctorily, perfunctory, plain, plainly, promiscuously, reckless, recklessly, regardless, regardlessly, relaxed, relaxedly, respectless, sans ceremonie, simple, simply, slapdash, sloppily, smooth, sociable, spur-of-the-moment, stopgap, superficial, superficially, tactless, tactlessly, thoughtless, thoughtlessly, unaffected, unaffectedly, unassuming, unassumingly, unceremonious, unceremoniously, unconcerned, unconstrained, unconstrainedly, unconventional, undiplomatic, ungracious, unguardedly, unheedful, unheedfully, unheeding, unheedingly, uninterested, unmindful, unmindfully, unofficial, unofficially, unpremeditated, unprepared, unready, unrehearsed, unsolicitous, unsolicitously, unstudied, untactful, unthinking, unthinkingly, unvigilantly, unwarily, without ceremony