Dong is a vulgar slang word for the penis. An example of a dong is what a vulgar person might call a penis.
What does dong mean?
(Entry 1 of 2) usually vulgar. : penis.
What does dong mean in Korean?
A dong or neighborhood is a submunicipal level administrative unit of a city and of those cities which are not divided into wards throughout Korea. The unit is often translated as neighborhood and has been used in both administrative divisions of North Korea and South Korea.