without reason, sense or good judgement; silly

nonsensical, idiotic

not serious or important; enjoying pleasure (too much)

trivial, silly

not being polite or caring about causing offence

without much thought

(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

(of words, remarks) spoken thoughtlessly

rash

careless; indiscreet

thoughtless; unwary

not prepared or ready

not ready