Family’s License Plates Deemed Offensive”

The plates, UDINK1 UDINK2 and UDINK3 are on the vehicles of Mike and Shelly Udink and their son Kalei. Two of the plates are five and seven years old. One was issued last year.

apparently the word DINK is a bad word. Does anyone know what it means. I haven’t looked it up because I am curious what you all say