In researching a story set in the U.S.A. during World War II, I came across a slang term for food procured through the black market (not rationing stamps). Now I can’t find where I read it.

In the instance I read, I believe it was a term for a side of beef, but I also believe it could be any food (later, I may stand corrected on that). I’m unsure if the word began with the letter “B,” but it may have.

What was the slang term in the U.S.A. during World War II for black market (i.e., illegal) food?