Ponytail
Hair gathered and tied at the back or top of the head, hanging free like a pony's tail.
Also: pony
A ponytail gathers the hair together and ties it with a band, so the length hangs free behind. A high ponytail sits at the crown; a low one at the nape; a side ponytail over one shoulder. The bubble ponytail adds bands down the length, and the sleek ponytail is smoothed flat with a brush and gel. Ponytails are quick, practical for sport and work, and the starting point for most buns and updos. The English name appeared in the 1950s.