That's the second time I've been asked that today, funnily enough! Yes, it's Fi Stevens being gunged in "Face to Face", one of Noise's Gungegirls clips. It should be in his UMD store.
"Purty diiiirrrty"? Think I get the gist even if I've no idea - I'm in the UK, sorry! - exactly what that means, lol! Is that Southern slang? If they said it in True Blood I might know it, but don't think they do.. ;-)