It is the combination of Wahh and Nigga. Wahh, is a phrase an Asian person says when surprised. Nigga, is what black people call each other as in homie. Thus, this is what you call Asian person with a black personality.
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.
A dance performed by camp counsellors and camp goers. The dance is performed with ones hands up high and their feet down low, that is how they wiggalo.
Jack: "Hey Lucy!"
Lucy: "Hey what?"
Jack: "Hey Lucy!"
Lucy: "Hey what?"
Jack: "Show me how you Wiggalo!"
Lucy: "With my hands up high, my feet down low, this is how I Wiggalo! "