i don't remember and I haven't seen the clip in a while, but I think the Simpsons are at B&N or some similar bookstore, and Bart wants to taunt the cashiers, assuming they're English grad students.
A movie is not about what it's about; it's about how it's about it.
Some questions cannot be answered
Who’s gonna bury who
We need a love like Johnny, Johnny and June
---Over the Rhine