Sorry, clarification in response to a comment. I started to post this as a comment, then it got too long, and I figured an education in the class structure of a seminary was good for all of you.
In an unclear story of origin (we're not sure if Duke Div holds claim to the term or if we here at Emory really did come up with it first), we've christened the second career students "wheelie-baggers."
The generalization stems from the tendency of older backs to necessitate bookbags on wheels. It's probably also convenient for hauling the poundage of books from the parking deck where many commuter students leave their cars when driving in from Alabama or Tennessee.
We've had quite intense discussions about who can be included in this prejudicial generalization, debating whether or not the wheelie-bag itself is necessary for inclusion. Our ultimate conclusion: it's not. If you sit in the front row of every class and ask somewhat ignorant questions that are completely off topic, laugh at racially-motivated jokes by the OT professor, and study excessively for daily reading quizzes, but your bag remains wheelie-less, you are still considered a "wheelie-bagger."
As a disclaimer, we who use the term are completely aware of its detrimental effect on the student community, but find it to be more of an indicator of current climate than a catalyst for more segregation.
So, there ya go. Wheelie-baggers.