The term "wigga" is a combination of the word white and the racial slur "nigger." Which has evolved to "nigga" with the common reference from African-American to African-American. The word basically refers to Caucasian males who have a psychological mindset, which makes them think that they are African Americans. They typically dress in hip-hop clothing (2 to 3 times their size), which they refer to as "urban wear". These people are typically wealthy Caucasian males, which live in the suburbs and do not have any affiliation or any idea of what the ghetto is like.

White (Caucasian)+Nigga (Nigger)= WIGGA

a true wigger is a suburban white kid, who talks and acts ghetto, but not so much dresses in urban clothes companies. many kids who do not talk or act ghetto but wear urban clothes(me) get a bad rep because of these people making an ass of themselves. if you are white, and you grew up in the hood, you are not a wigger because that is all you know. a white suburban kid acting ghetto is just as bad as a black suburban kid acting ghetto if you ask me.