Movies
Bullshit, I still can't hear you. Sound off like you've got a pair.
— Gunnery Sergeant Hartman • Full Metal Jacket

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker dismisses the response as too quiet and demands more volume through a crude challenge to courage or masculinity. The forceful wording makes being heard the immediate test. It reads as an aggressive demand for a louder answer, with little room left for hesitation.
Context reviewed