ping-pong

- Table tennis.

- An instance of figuratively bouncing something or someone back and forth.

- (Parliament) The exchange of proposed amendments between the two houses of parliament, particularly at the end of a session when compromises have to be made to complete the legislative process within the limited time available.

- A size of photograph a little larger than a postage stamp.

- To figuratively bounce or be bounced back and forth.

- To play the game of ping pong.