foolhardy

adj

1. Marked by unthinking recklessness with disregard for danger; boldly rash; hotheaded.

   “The master's pulse stood still, and he stared helplessly. The buzz of study ceased. The pupils wondered if this fool-hardy boy had lost his mind.”

   “In the middle distance several foolhardy souls in wet suits were surfing toward some foamy outbursts on the rocky headland; nearer in, a scattering of paddlers was being continually and, it seemed, happily engulfed by explosive waves.”

   “It is a reckless, foolhardy leap into the unknown and the prelude, perhaps, to what the existentialist writer Albert Camus described in La chute – a fall from grace, in every conceivable sense.”

noun

1. A person who is foolhardy.

   “Resentful of the saddle-fast stranger, eight foolhardies return for more adventure.”

   “Some foolhardies in the schoolhouse laughed at him then and Griff stuck their heads into toilets, one by one over the next week.”