Old-fashioned? Envy's from 1679, how much more old-fashioned does Sinatra want? Envy's still mentally calling cars 'horseless carriages' over here!
However, it's not the words 'old-fashioned' that Envy's brain latches onto. It's the word 'skirt'. He looks down at his clothes, then looks back at Odd. "There's shorts under here. It's called a skort."