"My father is a bit overweight" 是一种常见的表达方式。

"Overweight" 这个词来源于英语中的 "over" 和 "weight"， "over" 意为"超过"，"weight" 意为 "重量"，因此 "overweight" 的意思就是 "体重超标"。

下面是一些例句：

My father is a bit overweight, but he's been working on losing weight.
Overweight can lead to health problems, so it's important to maintain a healthy weight.
Being overweight is a risk factor for several chronic diseases, such as diabetes and heart disease.

中文翻译如下：

我爸爸有点胖，但他一直在努力减肥。
胖能导致健康问题，所以保持健康体重很重要。
超重是多种慢性疾病的危险因素，如糖尿病和心脏病。