What does anal ding mean?

anal ding meaning in Urban Dictionary

The event where your smartphone's Twitter messenger application tends to make a dinging sound making you examine stated message only to learn a conversation about anal sex. In that conversation, the term "ding" has become a reference to that occasion. Further, the application of the term "dong" as an answer to an anal dinging adds further hilarity since this is a reference towards male genitalia often useful for the aforementioned anal sex.