ランニングシャツ

noun

tank top; vest; singlet

Wasei-eigo from 'running shirt'. Refers to a sleeveless top worn as sportswear or as an undergarment. In Japanese, it is not limited to running contexts.

wasei-eigo (Japanese-coined English), from running shirt

• 夏なつはランニングシャツ一いち枚まいで過すごす。

  In summer, I spend the day in just a tank top.

• 運うん動どうするときはランニングシャツに着き替がえる。

  When I exercise, I change into a tank top.