“Mayochup”
“The surge in condiment innovation is a sign of the times.” Have we reached a point where we are so lazy that we can’t just mix our condiments ourselves? Will there be one mixed condiment to rule them all? Will there ever be upright condiment containers again?
But would you put it on a hot dog?
Maybe but, I’m a bit grossed out by the premix. Moving too close to the Russian dressing side of the scale
I’ll make my own condi-combo thank you very much!
My friend from the US Southwest says that everyone there puts ketchup+mayo on their french fries. “Fry sauce” is expected to be pre-mixed and available everywhere that serves fries. Maybe this is the impetus behind the new packaging but Heinz gave it a name that non-SWesters could understand plus they probably didn’t want to imply a single use-case by calling it “fry sauce.”
I’ll make it sometimes when I order fries, maybe a little sriracha squirt, too. Although I always keep ketchup and mayo at home, I never make it there because I don’t make fries at home, so I’d never buy this.
Pretty much everyplace has some kind of fry sauce (also used on chicken sandwiches, for chicken-strip dip, or on burgers) that’s a mayo/ketchup combination, sometimes with some BBQ or horseradish in there as well. So a pre-mixed version? Sure, why not.
But “Mayochup”? It doesn’t exactly roll off the tongue.
Indeed, what were they thinking? So many other good choices…
Mayomato sauce
Chuponnaise
(for those of us with hay fever now) Ketchaisse
Tomayonnaise
Tonnaise
T’aise
T’amazing sauce (T’awesome Sauce? T’awful Sauce?)
or just, as @anon48584343 says, Sauce of Contention 
and heavy on the peppers is my go-to for turkey or cheese sandwiches, sometimes burgers. Usually have a jar of it in the fridge.
(Cain’s is the mayo of New England, expats long for it.)
Hey…wait a minute…
what’s this stuff @SenorSchaffer found?
@anon30760835
Well, what about this, then?
And this…this may well be Russian dressing.
Not to be confused with Estonian Burger Sauce.
Wait, just wait! American Burger Sauce? …American Sandwich Sauce? Where does it all end???
I…I don’t know.
And we haven’t even gotten to the spreads yet. 
Or a lobster?
Oh, so you want a thread war.
Onion, chile, pickled turmeric, mustard, kimchi, and mayo. The rest is the work of man except for ketchup which is clearly the work of hellspawn rejected by Satan himself.
