Careless, hurried (8)
I believe the answer is:
slapdash
I believe this is a double definition.
'careless' is the first definition.
(similar in meaning)
'hurried' is the second definition.
(thesaurus)
(Other definitions for slapdash that I've seen before include "Slipshod, careless" , "Hurried and careless" , "Perfunctory" , "Cowboy" , "In a careless manner" .)