The British version - The action of slapping a man and/or woman in the face with your erected penis. Depending on the force of your polevault you can sometimes cause the 'Polevaultee' to lose balance. Thus having made the PERFECT Polevault!.
"aww Dude I just flopped it out and was Polevaulting them both, Billy and Kattrin right round the face."
"Yes way!, Kattrin couldn't even speak afterwards"