WordNet (r) 3.0 (2006):

pong
    n 1: an unpleasant smell [syn: niff, pong]

The Free On-line Dictionary of Computing (30 December 2018):

Pong

    A computer game invented in 1972 by Atari's Nolan
   Bushnell.  The game is a minimalist rendering of table tennis.
   Each of the two players are represented as a white slab,
   controllable by a knob, which deflects a bouncing ball.  The
   goal of the game is to "AVOID MISSING BALL FOR HIGH SCORE".

   Yahoo

(http://yahoo.com/Recreation/Games/Video_Games/Classic_Arcade_Games/Titles/Pong/).

   (1997-11-23)