courierbag
nounUK /ˈkʊriə bæɡ/
US /ˈkɜːriər bæɡ/
A bag with a long strap that you wear across your body to carry things.
She put her notebook and water bottle in her courierbag before biking to school.
OTHER MEANINGS
2. A bag used by a person who delivers messages or packages.
The courierbag was stuffed with letters for the whole street.
3. A small bag worn by a bike rider to carry tools and snacks.
He clipped his courierbag to the frame before the long ride.
4. A bag for carrying a laptop and papers to work or class.
Her courierbag held her laptop, charger, and lunch.