Pour the frozen meatballs into the basin of a 6 qt slow cooker.
Add the teriyaki sauce and drained pineapple chunks.
Stir until the meatballs are evenly coated with the sauce.
Cover and cook on HIGH for 2.5-3 hours or LOW for 6 hours.
Once cooked, serve the meatballs directly from the slow cooker or transfer them to a serving dish. Enjoy!