reckless

adjective
reck*less \ ˈre-kləs \
before 12th century{ds||1||}
  • marked by lack of proper caution : careless of consequences
  • irresponsible

reckless driving

noun
reckless driving \
  • the act of driving a car in a dangerous manner

with reckless abandon

idiom
with reckless abandon \
  • in a very wild and reckless way
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