What it means
A daredevil is the one who's always itching to send it a bit too hard. They'll try the sketchy jump, the daft stunt, the thing everybody else clocks and goes nope. It's got guts in it, but also a bit of look-at-me sparkle. You call someone a daredevil when they're hooked on risk and run on pure adrenaline.
Usage examples
"Total daredevil, he was off the top diving board before anyone could stop him."
"You'd have to be a bit of a daredevil to try that slope in this weather."
"Jess is such a daredevil, she saw the rail by the stairs and immediately wanted to grind it on a borrowed board."
"Only a proper daredevil would climb onto that warehouse roof for the view and call it a chill evening."
Where it comes from
Daredevil is built from dare and devil, with the sense of someone bold enough to challenge the devil himself. It turns up in English from the late 18th century for a reckless, risk-loving person, and it's stuck because the word already sounds like trouble in motion.