胖的瘦的用英文怎么说

"胖" 用英语表示为 "fat"，来自中世纪法语 "fat" 或拉丁语 "fatuus"，意为 "丰满的"。

"瘦" 用英语表示为 "thin"，来自古英语 "þynne"，意为 "纤细的"。

例句：

"I need to lose weight, I'm getting too fat." (我需要减肥，我太胖了。)
"She's always been thin, but now she's starting to look frail." (她一直很瘦，但现在开始看起来虚弱了。)