The Focker is a modified version of "The Shocker."
In an attempt to induce the focker, the male slides the index and middle finger into the vagina, while proceeding to slide the ring finger and pinky into the asshole.
A general term for any rapist, especially a serial rapist. Similar to Jack the Ripper, only he violently fucks people against their will instead of ripping them open with a knife.
Jill: "Well, it's getting late. I better go home now".
Mary: "Be careful when you pass those dark alleys. You never know if you'll run into Jack the Fucker".