SKEECOO SKEECOO
When trying to be discrete among kids, old ladies, or the neighbors, use this word twice in succession when describing the act of having sex. Say it fast and with a higher than normal pitch. Add a knocking air knuckle motion when saying this, imagine knocking on a door and that is the motion. As a fun option, add a clicking sound out of the corner of your mouth like you are calling the cat.
"Hey Courtney, that was a great day huh ? How about a little SKEECOO SKEECOO now to make it the perfect day ... "