"yes, supervisor let me go early today"
"Oh is that so?! you know what time it is?"
"It's about 4:20pm"
"NO it's not! it's boomshakalaka time baby!"
Person 1: "Boom shakalaka!"
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