WordWeb Online

1. Dependent upon or characterized by chance
   "a haphazard plan of action"
   - hit-or-miss
    
2. Marked by great carelessness
   "a most haphazard system of record keeping"
   - slapdash, slipshod, sloppy

1. 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"
   - haphazardly

See also: careless, haphazardly, haphazardness, random