A bowl utilized in medical tents during wartime, that would house the dirty rags of medical staff operating on patients. Once the bowls were full, it would resemble a bowl of spaghetti bolognese.

A Bowl of Spagetti for Chavs

Otherwise known as spaghetti bolognese. Or what most people would say “spag BOL”.... however, I’ve come across many using spag BOWL as in your having it in a bowl.

A bowl utilized in medical tents during wartime, that would house the dirty rags of medical staff operating on patients. Once the bowls were full, it would resemble a bowl of spaghetti bolognese.