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.
When a female has a very strong grip during a hand shake. The first thing that runs through your mind is that hand on your cock.
Dude 1: Did you meet the new girl Jenna?
Dude 2: Yep, that is one fine cock grip!
Dude 1: After we shook hands I went to the can a did a real quick pull and blow.
Dude 2: Word.