slapdash

/ˈslæpˌdæʃ/
adjective
  1. Done too quickly and carelessly; lacking attention to detail.
    • His slapdash work on the report led to several embarrassing errors.
    • I can't accept such a slapdash essay; please revise it carefully.
    • The painter did a slapdash job, leaving streaks and drips on the wall.
adverb
  1. In a careless, hurried manner.
    • He wrote the note slapdash and didn't check the spelling.
    • The shelves were assembled slapdash, so they wobbled dangerously.
    • She threw her clothes slapdash into the suitcase without folding them.