I hear this term can someone pls say what they are so when I am at real food I can avoid! Thanks A bunch!

Things that go down easy, without pain, but have high fat/calories that your body will still absorb (ex: like ice cream, which is my downfall) or high sugar drinks, etc.

Sliders aren't necessarily high calories/fat/carbs, but are simply foods that go through our stomachs easily and with little restriction. Many of the junk foods that we should avoid fall into that category - ice cream, chips, twinkies, crackers and the like. But many low calorie/high nutrition foods can also be sliders - peppers, onions, spinach, avocado (ok, not so low cal, but good nutrition when you can afford it), tomatoes and the like tend to go through me fairly easily (can you tell that I just made a salad?) and when added to some meat can increase the volume consumed with little caloric impact but a good addition to the daily nutrition. I would often have mixed meat and veg meals - stews, stir fries, salads, chili and the like once my Protein intake was fairly reliable and I could back away a bit from the "protein first" rule.

"Slider" is a bit like color - it is neither good nor bad, it just is. Green leafy vegetables are generally good, while green fuzzy meat is not. The same with sliders, and that can be used to your advantage as you progress through this process - benefit from the good sliders while avoiding the crap sliders. The greek yogurt that is often recommended is a great slider for getting in additional protein when meats and other firm Proteins are too restricted.