T-boy swag
A phrase popular in the LGBTQIA+ community to refer to trans men or transmasculine nonbinary individuals who adopt a more confident and exuberant demeanor once they start transitioning.

Sometimes t-boy swag is used in a light hearted, tongue in cheek way to describe a stage where trans masculine folks are new to presenting masculine and still finding their style.
"Elliot page is so hot, I love his t boy swag"

"Look at that handsome short king in the button up shirt and backwards hat - hes got t boy swag"

"Since Kai started T he's developed some real t-boy swag, he is so much more confident"