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.