aimless arbitrary careless casual desultory disorganized erratic helter-skelter indiscriminate offhand random slapdash uncoordinated accidental all over the map any old way any which way chance designless devil-may-care disorderly fluke hit-or-miss incidental irregular loose purposeless reckless slipshod spontaneous sudden unconcerned unconscious unconsidered unexpected unmethodical unorganized unpremeditated unsystematic unthinking willy-nilly