daredevil

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.”

To behave in a reckless, adventurous, or physically risky manner

Recklessly bold; adventurous.

“The climatic scene of “Rebel without a Cause” is the group of very daredevil teens playing chicken.”