Meatball is a period-7 oscillator found by Charity Engine on May 28, 2022. It bears similarity to 38P7.2 in terms of its ability to produce sparks, while having a slightly smaller bounding box. It has been used to reduce multiple glider guns, specifically p21 gun and p49 gun.
Its discovery led to the creation of multiple new LCM oscillators which were the smallest oscillators known for their respective periods. However, it has since been beaten out in this regard by 34P7.
Meatball and 34P7 have different profiles; while they are mostly interchangeable, there are some situations where one gets hit later on but the other doesn't. When either could be used, 34P7 has a smaller population, but meatball has a smaller bounding box.