N. rashness, temerity, want of caution, imprudence, indiscretion, overconfidence, presumption, audacity, precipitancy, precipitation, impetuosity, levity, foolhardihood, foolhardiness, heedlessness, thoughtlessness, carelessness, desperation, quixotism, knight-errantry, fire eating, gaming, gambling, blind bargain, leap in the dark, leap of faith, fool's paradise, too many eggs in one basket, desperado, rashling, madcap, daredevil, hotspur, fire eater, bully, bravo, hector, scapegrace, enfant perdu, don quixote, knight- errant, icarus, adventurer, gambler, gamester, dynamitard, boomer

V. be rash, stick at nothing, play a desperate game, run into danger, play with fire, play with edge tools, carry too much sail, sail too near the wind, ride at single anchor, go out of one's depth, take a leap in the dark, buy a pig in a poke, donner tete baissee, knock, one's bead against a wall, rush on destruction, kick against the pricks, tempt providence, go on a forlorn hope, go on a fool's errand, reckon one's chickens before they are hatched, count one's chickens before they are hatched, reckon without one's host, catch at straws, trust to a broken reed, lean on a broken reed

Adj. rash, incautious, indiscreet, imprudent, improvident, temerarious, uncalculating, heedless, careless, without ballast, heels over head, head over heels, giddy, wanton, reckless, wild, madcap, desperate, devil-may-care, hot-blooded, hotheaded, hotbrained, headlong, headstrong, breakneck, foolhardy, harebrained, precipitate, impulsive, overconfident, overweening, venturesome, venturous, adventurous, quixotic, fire eating, cavalier, janty, jaunty, free and easy, off one's guard

Adv. post haste, a corps perdu, hand over head, tete baissee, headforemost, happen what may, come what may

Phr. neck or nothing, the devil being in one, non semper temeritas est felix, paucis temeritas est bono multis malo