Movies
You are too old and fat to be jumping fences.
— Maddie • True Grit

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
Maddie is being blunt: someone is simply too old and too fat to be jumping fences. It's a plain, unsparing assessment with no cushioning, and the humour comes from how flat and practical it sounds, as if it were just a fact about fence-jumping.
Context reviewed