The vacuum
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When banging a girl doggystyle you grab her by the wrists and pull both arms back towards you. Thus causing her to [nosedive] into the bed/couch/floor. The moaning and heavy breathing causes a vacuum effect upon any surface her face comes in contact with. This move is [not for the faint of heart] but one that can yield spectacular results. In other words, [its a game] changer.
The vacuum meaning & definition 1 of The vacuum.