Characters
If this gets out, the next words you say will be muffled by your own butt.
— Moe · The Simpsons
Behind the line May contain spoilers.
Our reading
An editorial interpretation.
The speaker issues a crude comic threat to guard a secret: if it gets out, the listener will meet a grotesque, humiliating punishment. The line makes clear the menace is physical violence, and its silliness does not remove the warning. It is a blunt demand for silence.
Context reviewed