Time of day, usually mid-day when it's time to light up and pour up some liquor
Person 1: hello neighbor, what u got going on?
Person 2: it's a Sunday, 3'o clock, I ain't gotta work tomorrow. It's Buuki tyme
Hood term for when it's nothing to do, board, so u minds well roll up and drink and chill
Person 1: Damn it ain't shit to do this Sunday
Person 2: Shiiiit, u know what that mean? It's Buuki tyme