ping-pong /(?)/

ping·-pong

ping-pong

n.
  1. An indoor modification of lawn tennis played with small bats, or battledores, and a very light, hollow, celluloid ball, on a large table divided across the middle by a net. Also called table tennis. [[originally a trade name]
  2. A size of photograph a little larger than a postage stamp.

Ping-pong

v. i.
  1. To play ping-pong.
  2. to bounce back and forth, in the manner of a ping-pong ball.