The term used when you know for a fact that someone has stolen some of your food, but you don't know who it is. Even if you do know who it is, you couldn't blame them because they've stolen it so well that they could just deny it.
A slice of cheese, some wafer thin ham, a few cocktail sausages. All items that can be easily hawked if you know what you are doing.
Who's hawked my bread?
Someone's been in my freezer shelf and hawked a marsice-cream.
There's been some serious hawking going on recently.