cylindrical sports bag; drum-shaped gym bag
A wasei-eigo term for a cylindrical or drum-shaped bag, often used for sports or gym gear. Compare with ボストンバッグ (Boston bag) and ドラムバッグ (drum bag).
wasei-eigo (Japanese-coined English), from roll Boston
When I go to the gym, I put a change of clothes in my roll Boston bag and take it with me.
I found a cool roll Boston bag at that sports shop.
Variant with interpunct; less common but seen in some contexts.
Wasei-eigo from English 'roll' + 'Boston', referring to a cylindrical sports bag. The exact origin is uncertain, but it likely derives from the shape and association with Boston bags.