The term "zigga" is a combination of the word "zipperhead", which is a racial slur for people from Southeast Asia, and the word nigga, which has evolved from the racial slur "nigger".
J to the Z and Zigga is a jigga who became a zigga who tries to thrive and endures the hardship in life. AKA Ziggaman. Hey what's up Zigga? Ziggy Zaggy Ziggie etc
Zigga what's up? Where is all my ziggas? Zigga wants to be like a jigga.