Adrenaline junkie is a colloquial term used to describe someone who is addicted to thrilling and fear-inducing situations. The act of conquering fear creates a rush of endorphins that is simultaneously energizing and relaxing. This natural high leads adrenaline junkies to seek out ever-bigger thrills and excitement.
Some adrenaline junkies place themselves into dangerous situations. Others prefer to know that they are physically safe, but pit themselves against obstacles that make them feel unsafe. Halloween events and roller coasters particularly appeal to adrenaline junkies.
This is not a psychiatrically established term.