A hoe down is an action that can either be a ho (hoe) falling or the folk dance of western hillbilies. usualy dances in a square or an unorganized mob of people.
In the game Yahtzee, all five dice displaying the same number is a Yahtzee. When someone get's 3 Yahtzees in one game of Yahtzee, it's called a hoe down. (Similar to 3 strikes in bowling being called a Turkey )
A game usually played on the hit comedy show 'who's line is it anyway?' in which the contests have to sing improvised lyrics
about anything the audience choose to the backing track of a country tune.The Funniest wins.