My little brother has been eating too many snacks and looks a bit porky now.

porky 是形容词，来自名词 pork（猪肉），用来形容人"像猪肉一样肥嘟嘟的"，指"圆胖的、肉乎乎的"。 这个词带有非正式和幽默的色彩，通常用来形容小孩或年轻人可爱的胖乎乎状态。