airy
apathetic
ataractic
blase
boorish
caddish
careless
casual
coarse
crude
cursory
degage
devil-may-care
disinterested
dispassionate
disregardant
disregardful
easygoing
flippant
forgetful
free and easy
heedless
ill-bred
inattentive
inconsiderate
incurious
indifferent
inexcitable
insensitive
insouciant
lackadaisical
lazy
listless
loutish
louty
mindless
nasty
negligent
nonchalant
oblivious
offensive
offhand
perfunctory
pococurante
reckless
regardless
respectless
tactless
thoughtless
turned-off