feckless, foolish, heedless, impulsive, inadvertent, inconsiderate, indelicate, insensitive, instinctive, mechanical, negligent, oblivious, outrageous, rash, rude, selfish, senseless, tactless, thoughtless, uncaring, unconscious, unheeding, unmindful, unpremeditated, unwise, vacant, witless, undiplomatic, unintended, unmeant, untactful, blundering, napping, unreasoning