ping-pong
ping-pong , noun
[Imitative.]
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 , intransitive verb
1.
To play ping-pong.
2.
to bounce back and forth, in the manner of a ping-pong ball.