A longer and thicker version of the rat tail. Bitches can't keep their hands out of it. It derived from the sport of lacrosse, when a young man wanted to grow something as equal to the Jedi braid. Who know's maybe his bros liked to see it flow out the back of his helmet.
#1. Nice mullet bro! Hey man that's no mullet! Its clearly a power tail!
#2. Ewww what is that gross thing growing on the back of your head? That's a power tail my lady, would you like to feel? Oh i love your power tail!