peanut butter and jelly
Ewwww.
Not sure if you really know what a PB&J is, and are just making fun of the difference in terminology. But I know someone here in Australia who heard about Peanut Butter and Jelly sandwiches, couldn't figure out the appeal, and actually tried it. In Australia (and I'm sure other English speaking countries), Jelly = Jell-O. So this person made a peanut butter and jell-o sandwich.
To clarify, when an American says jelly, substitute that word with jam. I know I know, go to Walmart and you'll see a huge section with both jams and jellies (because there is a difference), but for all intents and purposes, jelly = jam.
Another interesting thing, grape jam isn't a thing here (at least, I couldn't find any in the normal supermarkets). Strawberry is popular, seen plum offered...but you're not going to get the wide variety like in the US. No gazing at all the choices...strawberry jelly or strawberry jam...seeds or seedless, with high fructose corn syrup or not...or maybe grape, blackberry, raspberry, even blueberry if you're lucky.
Oh, and you've only got a handful of peanut butter choices. You can get Kraft creamy or crunchy, or generic creamy or crunchy.