off-hand

off-hand
    adv 1: without preparation; "I don't know the figures off-hand"
           [syn: {off-hand}, {ex tempore}]
    

Offhand \Off"hand`\, a.
   Instant; unprepared; ready; extemporaneous; unrehearsed; as,
   an offhand speech; offhand excuses; an offhand comment. --
   adv. In an offhand manner; as, he replied offhand.
   [1913 Webster]
    

161 Moby Thesaurus words for "offhand":
      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