現在的愛美女士都瘋狂地追求瘦身，其實瘦未必等于身材好，有些人瘦成竹竿，但渾身的肉都軟趴趴的，還有小肚腩，這就是skinny fat（渾身肥肉的瘦子）。

If someone have skinny look but is all flabby underneath, you can call him a skinny fat. When you touch skinny fat, your touching hand sinks into fat before reaching muscle.

如果一個人看起來瘦瘦的，但渾身的肉卻軟趴趴的，你可以稱他為“渾身肥肉的瘦子”。如果你碰到一個“渾身肥肉的瘦子”，你的手碰觸到的將是肥肉而不是肌肉。

Skinny fats have a high fat percentage and low muscular mass. They are usually those people who have a low caloric diet, that's why they are skinny, but are not involved in any sports activities or trainings and that's why they don’t have any muscle.

“渾身肥肉的瘦子”肥肉多肌肉少。他們通常進食的卡路里數少，所以看起來骨瘦如柴，但因為沒有參加體育運動或鍛煉，所以沒什么肌肉。

Example:

People who don't lift get skinny-fat. They're thin but as weak as kittens.

不練舉重的人就會變得渾身肥肉。他們瘦瘦的，但卻弱得像小貓。

A: That girl is hot!

B: Dude, what are you talking bout, that girl is skinny fat!

甲：那個女孩好辣！

乙：老兄，你沒看錯吧，那個女孩是個渾身肥肉的瘦子！

（中國日報網英語點津 陳丹妮）