A smacking sound that comes from two partners while having sexual intercourse.
David: "What's that noise?"
Sarah: "Oh, thats just my roomates having sex."
David: "Wow, that's some serious slapage."
Sarah: "Oh I know."
by David_k927 December 2, 2013
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the sound of genitalia slapping on other body parts
person 1: damn i hate having a big dick
person 2: haha you're crazy. why do you hate it?

person 1: when i run my slapage is too much. i feel like everyone can hear it
by zacharyH February 8, 2018
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