Cheerfully irresponsible.
synonyms: carefree, freewheeling, happy-go-lucky, harum-scarum, slaphappy.
Roget 863:
rash,
incautious,
indiscreet;
imprudent,
improvident,
temerarious;
uncalculating†;
heedless;
careless
etc.
(neglectful)
460;
without ballast,
heels over head,
head over heels;
giddy
etc.
(inattentive)
458;
wanton,
reckless,
wild,
madcap;
desperate,
devil-may-care.
hot-blooded,
hotheaded,
hotbrained†;
headlong,
headstrong;
breakneck;
foolhardy;
harebrained;
precipitate,
impulsive.
overconfident,
overweening;
venturesome,
venturous;
adventurous,
Quixotic,
fire eating,
cavalier;
janty†,
jaunty,
free and easy.
off one's guard
etc.
(inexpectant)
508†.
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Roget 866:
indifferent,
cold,
frigid,
lukewarm;
cool,
cool as a cucumber;
unconcerned,
insouciant,
phlegmatic,
pococurante†,
easygoing,
devil-may-care,
careless,
listless,
lackadaisical;
half-hearted;
unambitious,
unaspiring,
undesirous†,
unsolicitous†,
unattracted.
[indifferent toward people]
aloof,
unapproachable,
remote;
uncaring.
unattractive,
unalluring,
undesired,
undesirable,
uncared for,
unwished†,
unvalued,
all one to.
insipid
etc.
391;
vain.
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Roget 885:
insolent,
haughty,
arrogant,
imperious,
magisterial,
dictatorial,
arbitrary;
high-handed,
high and mighty;
contumelious,
supercilious,
overbearing,
intolerant,
domineering,
overweening,
high-flown.
flippant,
pert,
fresh [U.S.],
cavalier,
saucy,
forward,
impertinent,
malapert.
precocious,
assuming,
would-be,
bumptious.
bluff;
brazen,
shameless,
aweless,
unblushing†,
unabashed;
brazen,
boldfaced-,
barefaced-,
brazen-faced;
dead to shame,
lost to shame.
impudent,
audacious,
presumptuous,
free and easy,
devil-may-care,
rollicking;
jaunty,
janty†;
roistering,
blustering,
hectoring,
swaggering,
vaporing;
thrasonic,
fire eating,
full of sound and fury"
[Macbeth].
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