Cheez Whiz is a delicacy in some parts of the world. I'm often, very often, asked to bring jars of it with me when I visit family back in Greece.
It's a freakshow in a can.
I'm not surprised they ask you to bring it back - seems like fantastic entertainment to me (hey look! It isn't an urban legend, that stuff on The Simpsons, it's actually real! SQUIRT - LAUGHTER)
As for my notion of nasty food
the kind of pre-grated parmesan cheese that doesn't need refrigeration
I call it desiccated parmesan
If you freeze-dried and powdered cat's vomit, it couldn't taste any worse - they certainly smell the same. And the stench from it on a neighbouring diner's plate is tragically pervasive. And what makes it a particularly nasty 'food' is that there are still people all over the world who think that this is what Parmigiano-Reggiano is and what it's supposed to taste like. (I had breakfast at a French hotel chain in Japan and asked if they had any cheese - the waiter came back with a packet of this stuff. I wish it would stay in the previous century)