The concatenation of "woman" and "pong". The effect a male suitor or partner experiences while waiting for a woman to get ready, as she bounces from room to room - bathroom, bedroom, kitchen, closet, living room, etc. - assembling herself for an evening out. Much as the video game pong
bounces a ball between to moving paddles, the effect is monotonous, boring, endless and/or frustrating.
"I got there at 7pm like we had agreed upon, but due to an hour and a half of wong, we did not leave her house until 8:30. This explains my tardiness and the stiffness of the drink currently in hand."