6 letters · 16 points in Scrabble
noun a hired hand who tends cattle and performs other duties on horseback
noun a performer who gives exhibitions of riding and roping and bulldogging
noun someone who is reckless or irresponsible (especially in driving vehicles)
originPIE word *gʷṓws From cow + boy. More on Wikipedia.
Etymology from Wiktionary, CC BY-SA 3.0