(with) a sound of bells

fickle, irresponsible

taking, involving, unnecessary task

impetuous, rash

without reason, sense or good judgement; silly

nonsensical, idiotic

not serious or important; enjoying pleasure (too much)

trivial, silly

not advisable

not recommended

silly

stupid

(especially) (doing things, done) without a proper sense of responsibility

careless, reckless

tasting, looking, like nuts; mad; crazy

deranged

unimportant; insignificant; mad; a child's pot used as a toilet

insane

completely impossible or ridiculous

ridiculous, bizarre

done, doing things, too quick, without enough thought of the possible result; (an appearance, patch, of) tiny red sports on the skin; a sudden spread

careless, impulsive

not thinking or caring about the effects, consequences

irresponsible in thought, deed

deserving to be laughed at; foolish

stupid, funny

behaving as if a little mad

giddy

not sensible; foolish

absurd, giddy, foolish

(of words, remarks) spoken thoughtlessly

rash