fat比较级是fatter。fat的最高级是fattest。fat是一个英语单词，可以用作名词、动词和形容词，可以翻译为肥的、胖的，脂肪；肥肉；（食用的）动植物油；（人体摄入的动植物）脂肪等等。
用fat造句The fat in the fryer had heated all right。油炸锅里的食油已经热了。Too much wining and dining is making him fat。他酒宴过多而身体发胖。He is n’t just fat,he’s flabby。他不只是有点儿胖，而且肌肉松弛。
His hair was gray and he was short and fat。他头发灰白，长得又矮又胖。He’s much fatter than he used to be。他比过去胖多了。