side ponytail
A ponytail worn to one side of the head, often low and over the shoulder. Common in casual and cute hairstyles.
wasei-eigo (Japanese-coined English), from side tail
I tried a side ponytail today.
A side ponytail is an easy hairstyle to do.
Wasei-eigo from English 'side' and 'tail', referring to a ponytail positioned on the side of the head.