Dirty Tonna is where 2 prostitutes engage in a sexual act with a bird causing that bird's feathers to be plucked out, shoved up ones anus, pulled out and then shoved up into the other one's vagina, while the bird watches!!
If you're not too careful with what you say, you're gonna get Dirty Tonna done to your bum!!!! If you're lucky her name will be Toni