delinquent
derelict
hit-and-run
inattentive
lax
neglectful
remiss
slack
apathetic
approximate
approximative
ataractic
beat-up
bedraggled
behindhand
blase
blowzy
botched
bungled
butchered
careles
careless
casual
chintzy
culpably negligent
devil-may-care
dilapidated
disinterested
dispassionate
disregardant
disregardful
distracted
distrait
drabbletailed
draggled
draggletailed
easy
easygoing
feckless
frowzy
frumpish
frumpy
fumbled
grasshopper
grubby
happy-go-lucky
harum-scarum
heedless
ill-advised
ill-considered
ill-contrived
ill-devised
ill-done
ill-executed
negligence
arrogant
corrupt
forgetful
frivolous
improvident
incompetent
indifferent
indolent
irresponsible
languid
nonchalant
thoughtless
unfeeling
ungrateful
unkind
unwise
wasteful
careful
fastidious
thorough