It's a thing in SoCal and Arizona, not sure elsewhere. Taco shops sell them, it's where they put carne asada, sour cream, pico, guac, and cheese on top of big french fries lol kinda like a Southwest poutine I guess?
Dysfunctionality: wait wait wait! Hold the phone! How have I never heard of this? Where do you go? I'm shuttling between LA and Orange County most weeks.