haphazard

"a haphazard plan of action"; "his judgment is rather hit-or-miss"

"a most haphazard system of record keeping"; "slapdash work"; "slipshod spelling"; "sloppy workmanship"

"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"