她不是很胖用英语怎么说

她不是很胖可以用 "she is not very overweight" 或 "she is not very heavy" 来表示。

"Overweight" 是 "超重" 的意思，表示身体质量指数（BMI）超过了健康范围。

"Heavy" 是 "重的" 的意思，可以用来描述身体重量。

例句：

She is not very overweight, but she wants to lose a few pounds. (她不是很胖，但她想减掉几磅。)
He is not heavy, but he looks muscular. (他不是很重，但他看起来很有肌肉。)