What is Ping-pong?
1.
the act of a male adjusting his manhood
While at work an a long summer night Dan played ping-pong to keep himself busy
See
2.
A electronic way to see if someone or something is on the other end of the line.
1: Carl pinged a server in Utah to see if it responded to packets. The server responded (ponged).
1a: Ping
1b: Pong
1a: Hello, Utah ;)