1)
Penis. Originally emerged in American
black popular
music, first made known to a wider audience by Chuck Berry in the song "My Ding a Ling".
2) Pejorative term suggesting stupidity.
1) "Y'all must be playin' with your own ding a
ling!" Chuck
Berry
2) So he tried for four hours to
charge his laptop, and then realized that he hadn't installed the battery.