Stuff people wear so that they can expose their penis/vagina
WHY THE HELL ARE YOU WEARING TRANSPARENT CLOTHING
This is a retort to when someone alleges they are being fully transparent when they are, in fact, utterly full of shit!
Loni: "I was so ready to help you all with that emergency work, but I am being fully transparent when I say that I was too upset to be able to do anything. I'm sorry but .."
Jake: "You're not sorry. You were outside eating Chick-Fil-A playing on your phone. It seems you are transparently trying to act like you give a shit. You don't, Loni! And I don't care about you..."