To express a feeling of joy and dominance, while at the same time trying to show to the world who you are and where you stand in the society.
To rub your achievments in an opponent or challenger's face to let them know you are in control and they cannot stop you.
Another way to say, "Who's your daddy?!?"
An expression to show people who's the boss
After an intense game of table tennis the father got into his son's face and yelled, "BOOM SHAKA LAKA!!!"