我不想变胖,我想变瘦用英文怎么说

"I don't want to gain weight, I want to lose weight" 可以说成 "I want to spm down"，这是一个常用的表达方式。

"Spm down" 意思是减轻体重，变瘦。它来源于英语中的 "spm"，意思是苗条的，纤细的。

例句：

I need to spm down before my wedding. (我需要在婚礼前变瘦。)
I've been hitting the gym to spm down. (我一直在健身房里减肥。)
She's been following a strict diet to spm down. (她一直在遵循严格的饮食计划来减肥。)