这个小胖子用英语可以翻译为 "chubby pttle guy" 或 "plump pttle guy"。

这两个表达方式都可以用来描述一个体型较胖的小男孩。

"Chubby" 是一个形容词，意思是 "胖嘟嘟的"，"plump" 也是一个形容词，意思是 "丰满的"。

下面是一些例句：

He's such a chubby pttle guy! 他真是个小胖子！
She's always been a plump pttle girl, but she's grown into a beautiful woman. 她一直是个小胖子，但长大后成了一个漂亮的女人。
My pttle brother is so chubby, I can't resist giving him a hug every time I see him. 我的弟弟太胖了，每次见到他我就忍不住要抱抱他。
The plump pttle guy at the grocery store was so adorable, I just had to take a picture with him. 那个在杂货店里的小胖子太可爱了，我只能和他合影留念。