noun
Wasei-eigo from 'training shirt'; refers to a sweatshirt, often used for sports or casual wear.
wasei-eigo (Japanese-coined English), from training shirt
寒いのでトレーニングシャツを着た。
I put on a sweatshirt because it was cold.
Variant with interpunct; less common in everyday writing.
スウェット is a more general term for sweatpants or sweatshirts, while トレーニングシャツ specifically means a sweatshirt.
Wasei-eigo from English 'training shirt', meaning a sweatshirt.