daredevil
1. [ adjective ] presumptuously daring
Synonyms: temerarious brash
Examples:

"a daredevil test pilot having the right stuff"

Related terms: bold
2. [ noun ] a reckless impetuous irresponsible person
Synonyms: swashbuckler hothead lunatic harum-scarum madcap
Related terms: adventurer tearaway
Similar spelling:   daredevilry
  daredeviltry