A person who actually does reading assignments for class that don't require any written answers.
Molly: What's the homework for class?
Peter: Read Part 1 Chapters 1 through 3.
Molly: There aren't any questions?
Peter: Nope, but you should still do the reading.
Molly: Fuck that, I'll just wing it.
Peter: Well I'm reading it because I want to be prepared.
Molly: Oh Peter Reader.