Slapage

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."

slapage

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