Slamming Share definition Flag The action of violently penetrating a vagina with your penis. So violent that it is heard by neighbours and passers by. Jemma: *Yawn* John: Why are u so tired? Jemma: Ah i was kept up all night by Connor slamming Katie. Slamming by Slamster May 27, 2010 0 0 Get merch Get the Slamming mug. Buy Now — $32.95 See more merch