The act of urinating on a woman's head, effectively drenching the hair, and then proceeding to have the woman give the man a blowjob whilst her wet hair is draped in front of her face, ergo dirty curtain.
A Dirty Curty is similar to a Dirty Sanchez, however when doing a chick doggystyle and sticking your finger up her ass, one does not give the chick a reacharound shit mustache but instead he gives himself the shit mustache.
Dude, we could see Joe railingthis chickfrom behind through his bedroom window, and he totally stuck his finger in her ass and gave himself a Dirty Curty.
A curry, usually of dubious quality, eaten in the early hours of the morning, in a backstreet emporium after a long hard night of massive alcohol consumption. Named for Curtis Davies, a sportsman who has been spotted around Birmingham enjoying this kind of meal.