Adjectives

(s)haphazard, hit-or-missdependent upon or characterized by chance“a haphazard plan of action”, “his judgment is rather hit-or-miss”
(s)haphazard, slapdash, slipshod, sloppymarked by great carelessness“a most haphazard system of record keeping”, “slapdash work”, “slipshod spelling”, “sloppy workmanship”

Adverbs

(r)haphazard, haphazardlywithout 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”