Your best bet is a model with a long strap that lets you position it across your chest like a messenger bag.
She still looked it, dressing in business casual and slinging a messenger bag over her shoulder.
The Words (2012) uses an excerpt from this book to represent a book manuscript found in an old messenger bag.
The messenger-racers unloaded their heavy chains and large messenger bags.
A guy with a messenger bag, annoyed, took the stairs.
I've gone to Australia for three weeks with just a bike messenger bag.
Vendors for most newspapers are identifiable by badges or messenger bags.
He also has brown hair, a messenger bag, and drags around a massive bone hammer.
As the man with the messenger bag hurried out behind her, one of the noisy women hissed, "I think it's performance art."
Hence the reason I'm looking at a sling backpack or a messenger bag.