1. A phrase used to describe anything that is made up of a mixture of things. The phrase refers to an advertising slogan for the H.J. Heinz Company's 57 varieties of pickles. This stew is definitely Heinz 57 variety—there's a lot of different things thrown into it.

2. A mixed-breed dog. I have no idea what breed Sparky is—he seems to be Heinz 57.