reckless

adjective

1. 1

   marked by defiant disregard for danger or consequences

   foolhardy enough to try to seize the gun from the hijacker

   became the fiercest and most reckless of partisans"-Macaulay

2. 2

   characterized by careless unconcern

   the heedless generosity and the spasmodic extravagance of persons used to large fortunes"- Edith Wharton

   reckless squandering of public funds