A topping, often for spagetti, used heavily by the italian nationality, often homemade or bought Ragu style, other brand names that are wanna be Ragu s like Brothers, Prego, and a few... However none match up to MAMAs home cooked sou-ce...
Often Said when 'schooling'/beating your competition... almost as is you were sayin 'in Yo' face Mo'Fo'...
(kid in a bball gmae makes a steal, brings the ball down court and dunks the ma'fa' ball in the dang net...)
Then says... 'Boo-Yah' ( all upi in their opponent's face.