haphazard

dependent upon or characterized by chance; "a haphazard plan of action"; "his judgment is rather hit-or-miss"

marked by great carelessness; "a most haphazard system of record keeping"; "slapdash work"; "slipshod spelling"; "sloppy workmanship"

without care; in a slapdash manner; "the Prime Minister was wearing a grey suit and a white shirt with a soft collar, but his neck had become thinner and the collar stood away from it as if it had been bought haphazard"