Ballpaps 

When a sexual partner smacks your balls and it makes that pap pap pap sound.

I love it when my lady gives me ballpaps whiles she's suckin

Ballpaps by Ausedbanana November 20, 2021

Ballpapering 

This is when your smartphone is hijacked (usually by a friend because you were stupid and didn't secure it with a passcode) and a picture of (usually their) genitals is used as the wallpaper, particularly the lock screen.

We are ballpapering johnny's phone with a picture of a big black penis found on google.

Ballpapering by boom_boom October 31, 2014