shirtlessly en · ADV
Etymology
From shirtless + -ly.
Meanings
-
(not-comparable) Without (wearing) a shirt.
In this way, we were all treated to the sight of Steven McCartney's spectacular pecs and abs as he shirtlessly rescued Pam Anderson's dogs. He looked really good for a guy our age, I must say.
2011, David Walker, Making Steven Famous, page 120: