It really depends on the shirt and how transparent it is. I have worn some but they don't look trashy, you can barely see the bra. If it is transparent enough to show details in my skin or even if my belly button is visible, then it is too much. It should just be enough to see the color of the bra. This is coming from a classy, realistic girl who could see things exactly for what they are and admits to her flaws. If I was trashy, I would wear that title loud and proud, just saying.. Now, wearing a shirt like this without a bra is definitely trashy.