Comes from "Muluka" Mul-luk-ka. The "U" pronounced as in "Luck". Muluka is an Aboriginal word for someone's husband, boyfriend or someone in authority.
Now refers to any male and is pronounced as "Muligah"
Sometimes the "Gah" is drawn out in friendly greeting, like "Hey Muligaaagh, what you bin doing?"
Budju and Muligah are used proudly to define oneself as having come from Darwin & The Top End or The Northern Territory.