What! What!

So the current phrase going around our house is not "dude" or "seriously" or "whatever" or "butt stinkin'" or "are you kidding me" as it has been in the past... but 'someone' has taken up the phrase "What! What!" And the phrase is not a questioning statement... but a from the hood 'What What' as an exclamation.
I do not understand.
Seriously, whatever. I don't get it. I am not even sure when to shout 'What What.' Dude, I don't even know what it means. I think the other phrases we use are butt stinkin' awesome and should not be replaced by these new fangled phrases. I like the old ones. "True that!"