конский хвост in English:

I used a ribbon to tie my hair into a ponytail.

The way she flips her ponytail will charm you before you realise it.

to have your hair in a ponytail

She wore her hair pulled back into a ponytail.

I usually wear my hair in a ponytail.

His thin hair was tied back in a ponytail.

The girl with the ponytail looks mean.

She combed her hair, sweeping it into a long ponytail.