'Fool hardy' in the Bible

And they gave him seventy pieces of silver from the house of Baal-berith, with which Abimelech hired worthless and undisciplined men, and they followed (supported) him.

She replied, “No, my brother! Do not violate me, for such a thing is not done in Israel; do not do this disgraceful thing!

“No one is so fierce [and foolhardy] that he dares to stir up Leviathan;Who then is he who can stand before Me [or dares to contend with Me, the beast’s creator]?

and especially those who are abandoned to sensuality--craving, as they do, for polluted things, and scorning control. Fool-hardy and self-willed, they do not tremble when speaking evil of glorious beings;