A Rosenberg dinner is basically leftovers. What didn’t get eaten today and what got thrown in the dumpster today, will end up in tomorrow’s soup. If you didn’t get heartburn from your meal, you for sure got the shits. The kind of shits you piss out if your asshole.
A Rosenberg dinner is usually undercooked and tasteless.
I gave my Rosenberg dinner to my cat, and he immediately covered it with sand.