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

reckless, outrageous

taking, involving, unnecessary task

impetuous, rash

happening without having been planned; depending on chances

without plan or organization

of, like, an imp

mischievous

(of a person, behaviour) acting on, resulting from an impulse

tending to act without thought

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

careless, reckless

feeling, showing, self-confidence and self-satisfaction

lively

not taking care

slack, remiss

unmindful of social conventions

unmindful of social conventions

wild and daring; on one side

charming and immoral

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

connected with, interested in, sport; showing fairness

playful

(of words, remarks) spoken thoughtlessly

rash

(of an answer, action) not said, done etc as the result of a hint, suggestion etc

tending to act without thought