J's newest funny saying

So Jonathan goes through these stages where he has one sentence or word that he says that just cracks everybody up! The newest one started off as "What you doing?" which sounds more like "Whatchu doin?" it has now evolved to "Whatchu doin Pica?" followed by "Pica, whatchu doing?" It sounds so funny that it has all of us in my brothers house repeating it throughout the day! He calls my niece Pricilla, Pica. Where he came up with it I have no clue but he has always called her that. He can say Priscilla and will say it on rare occasion. But just like he can say Heather he chooses not to and calls Heather... "YeahYa". I need to get a video of him saying it because it really is the funniest thing!