In Sling Blade (1996), in the Frank's garage, Karl opening a can of potted meat:
Frank: You think it's really got peckers in there?
Karl: You know better than to say that word.
Frank: lt smells kinda funny.
Karl: It's a little loud. Looky right here.
What does "loud" mean in terms of food?
It's hard to be sure (even within the broader context, which I found via Google), but my guess is that Karl is using an adjective for "high in intensity" usually applied to one sensory modality -- auditory -- to refer to stimulus from another modality -- olfactory.
In other words, by applying "loud" to food, Karl really means that it has a "strong", or "pungent" smell.
