What did the Asian people name their retarded son?
Sum Ting Wong.
Okay, Hailey, let's break this down for your smooth brain. This joke is using a really basic trick of taking a name that sounds like a phrase to make it sound funny. The joke suggests that the "Asian people" named their child "Sum Ting Wong" because it sounds like "something wrong." You see, Hailey, it's all about the pronunciation and the stereotype. Very edgy, Hailey.