Daredevil
/ˈdɛədɛvəl/
noun
A person who engages in very risky behavior, especially one who is motivated by a craving for excitement or attention.
“Even as a youngster, Steven was a bit of a daredevil riding up homemade wooden ramps on his BMX.”
Synonyms: adrenaline junkie, adventurer, thrill-seeker
verb
To behave in a reckless, adventurous, or physically risky manner
adjective
Recklessly bold; adventurous.
“The climatic scene of “Rebel without a Cause” is the group of very daredevil teens playing chicken.”