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Adjective: slapdash  'slap,dash
  1. Marked by great carelessness
    "slapdash work";
    - haphazard, slipshod, sloppy
Adverb: slapdash  'slap,dash
  1. In a careless or reckless manner
    "the shelves were put up slapdash";
    - slam-bang [informal]
  2. Directly
    "he ran slapdash into the pole";
    - bang, slap, smack [informal], bolt

See also: careless, cavalier

Encyclopedia: Slapdash