The phrase "mini sliders" refers to small sandwiches or burgers that are usually served at parties or as appetizers. They are called "sliders" because they are small in size and can easily slide into your mouth. Full definition
Mango chia pudding, gooey cinnamon roll oats, green smoothies galore, cleansing salads, immune - boosting soups, lettuce wraps, plenty of quinoa recipes, mini slider burgers, chocolate banana bars, kiwi chocolate cups and more. (theglowingfridge.com)
Or you could make traditional Italian Meatballs with Cheese and Tomato Sauce on mini slider buns topped with fresh basil and parsley. (blog.kitchenaid.com)