irresponsible

cheerfully irresponsible

someone who is reckless or irresponsible (especially in driving vehicles)

n a hired hand who tends cattle and performs other duties on horseback n a performer who gives exhibitions of riding and roping and bulldogging n someone who is reckless or irresponsible (especially in driving vehicles)

insanely irresponsible

a reckless impetuous irresponsible person s