(especially of a young person) rude and not showing respect

impulsive, brazen

(of a person) not taking care; thoughtless

without sufficient attention

(of a person) filled with despair and ready to do anything regardless of danger

reckless, outrageous

taking, involving, unnecessary task

impetuous, rash

without reason, sense or good judgement; silly

nonsensical, idiotic

said, made or done (too) quickly

speedy; without much thought

not being polite or caring about causing offence

without much thought

not advisable

not recommended

(of a person, actions) thoughtless

insensitive to others

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

careless, reckless

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

not thinking; selfish; inconsiderate

inconsiderate

(of words, remarks) spoken thoughtlessly

rash

careless; indiscreet

thoughtless; unwary