When you are prepared to have sex with someone you never had, and after many dates and advances, you finally get it, and are disappointted by either it's smell, it's hygenie or overal physical demeanor.
"So I finally got Jamie into the sack, but bitch had the filthy wonton."
Although most common in prostitution rings, the fithy pussy consists of a "strung-out" vagina, it often resembles the sleeve of a wizard. STD's are also a notable characteristic.
Ant: Dudeeeeee that girl Michelle is bangin!
Nick: Nah chill man, I heard she has a filthy pussy.
When the dominant male uses trickery and deception to convince their prey to peer bending over into a waste disposal container, then proceeds to "Filthy the Ronald" (also known as plugging the poop pipe). With each pelvic thrust, the head of the aforementioned Ronald that is being filthied, strikes the inner side of the waste depository.
"dude, anton clifford, theres 20$ in theat garbage can over there!"
"really?"
"yea"
as anton clifford looks for it he gets a filthy ronald.
when you are fuckin a girl from behind, up against a wall, you take your penis out of her vagina and stick it in her bumhole. Then you hold her down as she struggles to get away, which will look like shes trying to climb up the wall.
Joe : hey man i gave karen a filthy gecko last night!
Bob : HAHA yes (high fives Joe)