A "messy ponytail" is a hairstyle where the hair is tied up loosely and looks slightly untidy or disheveled, giving it a casual and relaxed appearance. Full definition
And wear my dirty hair in messy ponytails while fighting the wind. (stilettosanddiapers.com)
Models donned milkmaid braids, free - flowing waves and curls, while a few sported messy ponytails, which we thought skewed to the wrong side of «woke up like this.» (thefashionspot.com)
Beauty wise: we created a loose messy ponytail and kept the makeup natural with a fresh complexion and a bold lip. (kinddistinction.com)