If you've never heard of it before, Visible Panty Horror or VPH, is when a woman's trousers are so low and her g-string so high, that you can see the top of her knickers riding high above in a familiar T-bar shape.
Sheila talks to Hannah Burrowman of City Life Magazine, expert in the history of knickers, Josie Sheppard, and Adele from Big Brother. To take part in the debate