However, Vince, on Jen's house's veranda, was naked from the waist up. He might even have been starkers!

He was bare to the waist.

Please undress from the waist up.

The boy was naked to the waist.

If a women walks on a public street exposing her lower body, it's public indecency. If she walks while exposing her upper body, then it's a violation of article 20(1) of the minor offenses act.

I visited the atelier of a painter that I had not visited in a long time. This painter had just acquired a new model and he was in a very good mood.

Tom is barechested.

Tom was stripped to the waist.

Woah, you scared me! Don't just suddenly speak so loudly like that!