SOS n. Shit on a Shingle.
In the military this refers to creamed chipped beef on
toast.
In the Southern US, a similar dish is made consisting of chunks of fried ground beef in a thin cream
gravy, served over
toast. It is associated with poverty, because it is cheap, packed with calories, and filling.
"Hey mama, is that SOS ready
yet?"
"
Naw, we're out of PET milk, somebody's gonna hafta
go ta the store."