Sorry culinary ignorance again what is a slider?
It's a slang name for a very greasy hamburger. I think it may have started in the military chow halls where the burgers would be sitting in trays floating in grease. (BTW, White Castle burgers are greasy, but not THAT greasy, LOL).
This one has bacon on it. They are about 4 inches in diameter and they cook them in bunches and they slide them onto the little buns three or four at a time, this "Sliders". They are little hamburgers with a flavor unmatched anywhere. I think MB will admit that she like them.