When a girl's vagina is so incredibly tight that it is visible during sex. Her pussy lips stretch around the penis. The lips visibly get pushed in with each thrust and are pulled out when a cock is sliding out. Look it up on PornHub, it's a thing.
Guy 1: Dude, Melissa is so short and petite. I bet her pussy is so tight it grips.
Guy 2: I fucked her a while ago. My cock got a good pussygripping. But not after I was done.
A ternary logic used when you are dealing with three equally unpleasant alternatives rather than two; the third (gripping) hand being dominant or determinative. Expression common among sci fi geeks and computer people.
From a science fiction novel entitled "The Mote In God's Eye" where an intelligent alien race has evolved with two minor arms (with fine fingers for work) on their right and one larger (gripping) arm with three strong fingers on their left.
On the one hand, Obama's a knucklehead and I can't stand him. On the other hand, he still has a lot of people who thinks he walks on water. On the gripping hand, we only have to put up with him for two more years, so we shouldn't bother to try to impeach him.
Grabbing the shaft with one hand while placing the other hand above thus stroking the head as well, continuously. Special care must be taken during this procedure to ensure satisfaction and safety. Wear eye protection for stray streams. A tingling sensation may occur afterwards.