When you lay next to a guy and place your left foot over his body close enough to his dick. Place the back of your knee on his dick (make sure he has a semi) grip the dick with your leg and stroke up and down. This is called the Vice Grip.
Also known as "The Human Flesh-light", the "Vice-Grip" was invented.. and perfected, by a Canadianpunk band called "Vices, live in 3D!"
What it consists of, is grabbing the girl, (Or guy, whichever is closer), tightly by the throat with both hands and thrusting the receiver balls-deep down the shaft of one's penis, repeatedly, much like you would with a Flesh-light. But you need a Vice-like grip to really get the job done!
"Hey Joe, did you give that girl the old vice-grip last night?"
"Obviously! I love The Human Flesh-light. It's like masturbating with company!"
"Hell yeah!"
"But she suffocated and now I have this corpse in my bed."
"METH!"