baby fat
noun [ U ] US uk/ˈbeɪ.bi ˌfæt/ us/ˈbeɪ.bi ˌfæt/ (UK puppy fat)
儿童时期的肥胖（长大后即消失）
fat that a child sometimes has that disappears as the child grows older
He's a little overweight but it's just baby fat. 他有点超重，不过这只是一时的小儿肥胖。
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