Can also be used as a verb. "Piledriving"
"No, sadly she won't let me."
"Hey, did you see the latest Max Hardcore movie?"
"For sure, he really piledrived the living hell outta that chick!"
This is a sexual position that requires considerable flexibility on the part of the receiver and it cannot be (fully) achieved by most. It is advantageous for its feeling of being totally exposed and "giving it all". Those less flexible might try getting into the position, but stop at the point where the position starts to become uncomfortable. The giver can also help those less flexible by using their hands to support the receiver's thighs at mid-point. The giver should be careful not to over-extend the penis beyond what is comfortable at this unusual angle (penis pointing downwards).
2. A sexual position where the woman is standing on her head and the male proceeds to take her legs, spread them apart, and penetrate (as he's standing up). This is rather tricky, as both parties need to have a good sense of balance.
3. A machine that drives piles (those wooden things you see at the beach sometimes) into the ground. This is actually where the wrestling move got its name. It uses a heavy weight to hammer the pile into the ground.
2. guy 1: so you try anything new with the wife last night?
guy 2: yeah, we decided to do it piledriver style.
my junk hurts. she liked it though.
3. I think the pile driver's broken. We can't put the barrier up today.