The best sauces for dipping are the ones created like George's Marvellous Medicine.

Just bang a load of different ingredients into a bowl and mix it.

...and just like in the book, they can't be replicated

Here's a recipe for my goto fry sauce:

• Ketchup

Fry sauce is a condiment the same way "w" is a letter.

It's actual two pretending to be one.

Sooo, thousand island without the pickles!

It's not like mixing condiments with other condiments is some kind of horrible idea. It often ends up great.

That being said, my personal taste doesn't like something as fatty as mayo on most fried foods, and even then I wouldn't want it mixed with ketchup, and I wouldn't want much. Like, home made tartar sauce in minute quantities with fried fish is acceptable. Some honey mustard sauce (which usually has mayo in it in commercial products) with chicken nugget/tenders is great.

But I've tried most of the fries add-ons. Poutine is okay, but not what I'd order often. Gravy is a meh in general, even as a dipping sauce. I can get behind chili sauce, particularly with cheese, but only rarely because damn that heartburn. But 999/1000, it's going to be ketchup with fries, maybe bbq sauce of some kind. Barring those thicker options, some nice malt vinegar is great. Otherwise, I'll drop some spices and call it done. (I have a habit of freestyling spice blends that are one-offs in small batches, and I did a fry mix that I regret not having the proportions written down for).

But if someone out there likes the po' man's thousand island to dip in? Rock on my fellow human!