a man-purse. very fashion-forward right now, seen on many hipster guys. the line between a messenger bag and murse is very fluid - typically a murse is a bit smaller than a traditional messenger, and may have a slightly more stylized look to it. a murse can also be used to carry a laptop computer - one of the reasons it is so popular right now.
"wow, Mark's new laptop fits perfectly into that small bag he carries"
"yeah, that's a great murse. it matches his american apparel shirt."