He's a little chubby.

The phrase "a little chubby" is a way of saying that someone is slightly overweight. This phrase comes from the word "chubby," which means plump or plumpness.

Here are some examples of this phrase in use:

"My little brother is getting a little chubby these days. I think he needs to start exercising more."

"I used to be a little chubby when I was a kid, but now I'm in good shape."

"Some people think that being a little chubby is cute, but I think it's important to be healthy and maintain a healthy weight."