Yes that's pretty much it. Not related to "doggy bag" though. Actually I found a plethora of slang definitions, some slurs, some more what I intended.
What I meant is that a dog will go around and just eat whatever edibles it finds, not needing any theme or relationship, one thing at a time irrespective of what preceded or followed it.
I can understand that a Brit would consider it offensive, and I apologize for that. I hadn't been aware of the Brit slang before.
For me it would mean cleaning out my fridge for all the "this and that" left overs from the last few meals.
I think it is a great term, and I can really see myself using it in the future. I am surprised that I've never heard it before.
CD