There's so much industry lingo out there. As I research agents and publishers, I've come across some lingo that I've had to research online so that I know exactly what they're looking for in who or what they represent. One such example, one that keeps coming up regularly, is "upmarket".
In my research, I came across this blog at "Guide to Literary Agents" which truly describes what "upmarket" means. I've included the link below: