Student or Learner
From The Catcher in the Rye:
"I'll just tell you about this madman stuff that happened to me around last Christmas just before I got pretty run-down and had to come out here and take it easy."
What does "run-down" mean in this context?
In this context, "run down" means he hasn't eaten properly or gotten enough sleep recently. Your body feels like it's dragging, and your mind is weary.